Answer:
0.8x – 12
Step-by-step explanation:
The sale price is (x-15). After the 20% discount, the final price is 0.80 times the sale price is final price = 0.80×(x -15) = 0.80x -12
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how do you write an=an-1+6;a1=9 in explicit formula
an=an-1+6, written in explicit formula when a = 9 is aₙ = 9n+5
How to write an arithmetic sequence explicit formula?
An explicit formula is given as aₙ= a + (n - 1) d
where,
aₙ = nth term of the arithmetic sequence
a = the first term of the arithmetic sequence
d = the common difference
Given: aₙ = an-1+6 ;a1= 9
Substitute a = 9 into the equation:
aₙ = 9n-1+6
aₙ = 9n+5
Therefore, an=an-1+6, when a = 9 written in explicit formula, is aₙ = 9n+5
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Select the correct answer. A line passes through point C and is parallel to AB ⟷ . What equation represents this line?
The line parallel to line AB will have the same slope with different
y-intercepts.
What are lines and their slopes?We know lines have various types of equations, the general type is
Ax + By + c = 0, and the equation of a line in slope-intercept form is
y = mx + b.
Where slope = m and b = y-intercept.
the slope is the rate of change of the y-axis with respect to the x-axis and the y-intercept is the (0,b) where the line intersects the y-axis at x = 0.
We know lines parallel to each other have the same slope with a different y-intercept.
Suppose the line AB has an equation y = mx + b.
∴ The line parallel to line AB will have an equation y = mx + c.
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Answer:
y=1/2x-3
Step-by-step explanation: if you are using edmentum this is correct.
If 1200 square centimeters of material is available to make a box with a square base and an open top, find the largest possible volume of the box.
The largest Volume of the box possible is 4000 cm³ .
In the question ,
it is given that
the box has a square base ,
let the length and width of the box = "x" , because it is a square
let the height of the box [tex]=[/tex] h
the total surface area of the box = 1200
also the total surface area with open top is = x² + 4xh
So , x² + 4xh = 1200
h = (1200 - x²)/4x
According to the question ,
the volume of the box = x²h
Substituting the value of h = (1200 - x²)/4x ,
we get ,
Volume = x² × (1200 - x²)/4x
V = (1/4)(1200x - x³)
to Maximize the volume dV/dx = 0
(1/4)(1200 - 3x²) = 0
1200 - 3x² = 0
3x² = 1200
x² = 400
x = -20 , +20
length cannot be in negative , hence x = 20 ,
So , Volume = (1/4)[1200(20) - 20³]
= 4000 cm³
Therefore , The largest Volume of the box possible is 4000 cm³ .
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In the diagram below, FG = 10.9, FH = 6.5, and GD = 9.1. Find the length Round your answer to the nearest tenth if necessary.
Look at the picture. Then choose the correct option from each drop-down menu.
AC choose..
A. Is
B. Is not
perpendicular to XZ, because the slope of AC is Choose...
A. -1
B. -2
C. 2
D. 1
and the slope of XZ is 2/3
AC is not perpendicular to XZ, because the slope of AC is -1 and the slope of XZ is 2/3. Therefore, the correct answer options are:
B. Is not
A. -1
How to calculate the slope of a straight line?Mathematically, the slope of any straight line can be calculated by using this formula;
Slope, m = (Change in y-axis, Δy)/(Change in x-axis, Δx)
Slope, m = (y₂ - y₁)/(x₂ - x₁)
For the slope of AC, we have the following:
Point at A = (-1, 3)
Point at C = (4, -2)
Slope, m of AC = (-2 - 3)/(4 - (-1))
Slope, m of AC = (-2 - 3)/(4 + 1)
Slope, m of AC = -5/5.
Slope, m of AC = -1.
For the slope of XZ, we have the following:
Point at X = (12, 2)
Point at Z = (6, -2)
Slope, m of XZ = (-2 - 2)/(6 - 12)
Slope, m of XZ = -4/-6.
Slope, m of XZ = 2/3.
In Mathematics, a condition that must be met for two lines to be perpendicular is given by:
m₁ × m₂ = -1
-1 × 2/3 = -1
-2/3 = -1 (False).
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help meeeeeeeeeeee pleaseee rnnnnn!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!help meeeeeeeeeeee pleaseee rnnnnn!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
a. The number of students that this school is going to have to enroll abroad in the year 2001 is 150
b. In the 2018 academic year, it can be said that the school would also have to enroll 468 students in the school
How to calculate the population sizea. The equation is as follows:
y = 123.1 * (1.069)^x
The value of x would be years that have changed.
To get the value of x we would have to find the differences that lies in the two years.
Hence
2001 - 1998 = 3
We would place the value of x in the equation
y = 123.1(1.069)³
Then
y = 150.4
This is approximately 150.
In conclusion, There would be 150 students enrolled in the school, according to estimates, in 2001.
b. For the year 2018
We would have to carry out similar calculation
x = 2018 - 1998
This would give us 20 years difference
Place x = 20 in the equation
y = 123.1(1.069)²⁰
y = 467.5
This is approximately
y ~ 468
468 would be enrolled in the school in 2018.
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Evaluate the expression 2x−yz , where x=34 , y=−0.2 , and z = 6. responses 0.3 0.3 1.95 1.95 2.7 2.7 i don't know.
The value of 2x - yz with x = 34, y = 0.2, and z = 6 we get 69.2.
Here it is given that
x = 34
y = -0.2
z = 6
We need to calculate 2x - yz
If we first calculate 2x then we get
2x = 2 X 34
= 68
Now, if we calculate -yz next then we see
yz = -0.2 X 6
= -1.2
Hence
- yz = -(-1.2)
= 1.2
Therefore, adding up these two we get
2x - yz
= 68 + 1.2
= 69.2
Hence the value of 2x - yz is 69.2
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Correct Question
Evaluate the expression 2x - yz , where x = 34 , y = -0.2, and z = 6
Whats the answer to 5/8-2/8?
Answer:
0.375
Step-by-step explanation:
For a lower tail test, the p-value is the probability of obtaining a value for the test statistic at least as.
For a lower tail test, the p-value is the probability of obtaining a value for the test statistic as small as or smaller than that provided by the sample. For an upper tail test, the p-value is the probability of obtaining a value for the test statistic as large as or larger than that provided by the test statistic.
In statistics, the p-value is the probability of obtaining results at least as extreme as the observed results of a statistical hypothesis test, assuming that the null hypothesis is correct. The p-value serves as an alternative to rejection points to provide the smallest level of significance at which the null hypothesis would be rejected. A smaller p-value means that there is stronger evidence in favor of the alternative hypothesis.
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each of these extreme value problems has a solution with both a maxi- mum value and a minimum value. use lagrange multipliers to find the extreme values of the function subject to the given constraint. f (x, y, z)
The maximum value is; +√21 and the minimum value is; -√21
What is a function?Function is a type of relation, or rule, that maps one input to specific single output.
We are given that
f(x,y,z) = x² + y² + z²
g(x,y,z) = x⁴ + y⁴ + z⁴ - 7 = 0
Using Lagrange multipliers as follows;
df/dx = λg/dx,
df/dy = λg/dy.
df/dz = λg/dz
Thus, df/dx = 2x, df/dy = 2y, df/dz = 2z
dg/dx = 4x³, dg/dy = 4y³, dg/dz = 4z³
So, df/dx = λg/dx
2x = 4λx³ (1)
df/dy = λg/dy
2y = 4λy³ (2)
df/dz = λg/dz
2z = 4λz³ (3)
From (1) 4λx³ - 2x = 0
2λx³ - x = 0
x(2λx² - 1) = 0
Now solving; x = 0 or (2λx² - 1) = 0
2λx² = 1
x = ±1/√(2λ)
since x ≠ 0
From (2) 4λy³ - 2y = 0
2λy³ - y = 0
y(2λy² - 1) = 0
Now solving, y = 0 or (2λy² - 1) = 0
2λy² = 1
y = ±1/√(2λ) since y ≠ 0
From (3) 4λz³ - 2z = 0
2λz³ - z = 0
z(2λz² - 1) = 0
now solving, z = 0 or (2λz² - 1) = 0
2λz² = 1
z = ±1/√(2λ) since z ≠ 0
Then we have g(x,y,z) = x⁴ + y⁴ + z⁴ - 7 = 0
(1/√(2λ))⁴ + (1/√(2λ))⁴ + (1/√(2λ))⁴ - 7 = 0
3 (1/√(2λ))⁴ = 7
(1/√(2λ))⁴ = 7/3
1/√(2λ) = ⁴√7/3
√(2λ) = ⁴√3/7
2λ = √3/7
λ = 1/2(√3/7)
Since we know that x = 1/√(2λ) = 1/√(2 [1/2(√3/7)]) = 1/⁴√3/7 = ±⁴√7/3
Also, y = 1/√(2λ) = 1/√(2 [1/2(√3/7)]) = 1/⁴√3/7 = ±⁴√7/3
and, z = 1/√(2λ) = 1/√(2 [1/2(√3/7)]) = 1/⁴√3/7 = ±⁴√7/3
Now Substituting x,y and z into f(x,y,z) we have;
f(x,y,z) = (⁴√7/3)² + (⁴√7/3)² + (⁴√7/3)² = 3(⁴√7/3)² = 3(√7/3) = √(7 × 3) = ±√21
Hence, the maximum value is +√21 and the minimum value is -√21
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please help what is the solution
Answer:
1 < x ≤ 6 is the solution
Step-by-step explanation:
Given
6 < x + 5 ≤ 11
Solution
Subtract 5 from the 3 terms. You do this so you can isolate x
6 - 5 < x + 5 - 5 ≤ 11 - 5
1 < x≤ 6
x lies between 1 and 6.
Find the value of x.
Answer:
x = 6Step-by-step explanation:
According to triangle proportionality theorem we have equal ratios:
(6x - 1 - 14)/14 = (15 - 6)/6(6x - 15)/14 = 9/6(6x - 15)/14 = 3/22(6x - 15) = 3*1412x - 30 = 4212x = 72x = 6The value of x will be 6 units.
What is mean by Triangle?
A triangle is a three sided polygon, which has three vertices and three angles which has the sum 180 degrees.
Given that;
The triangle is shown is figure.
Now,
By the definition of triangle proportionality theorem, we get;
⇒(6x - 1 - 14)/14 = (15 - 6)/6
Solve for x as;
⇒ (6x - 15)/14 = 9/6
⇒ 6x - 15 = 9×14/6
⇒6x - 15 = 21
⇒ 6x = 21 + 15
⇒ 6x = 36
⇒ x = 6 units
Thus, The value of x will be 6 units.
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the combined score for yakubu in geography, economics and science is 194. he scored twice as many marks in economics as in geography and four more marks in science than economics. find his marks in each of the three subjects.
The scores of geography, economics and science are 38, 76, 80 respectively.
Let Yakubu scored x marks in geography.
Given that the score of him in economics is twice of the score of him in geography.
So, his score in economics = 2x
Again it is given that, the score in science is 4 more than the score in economics.
So the score in science = 2x+4
According to question the combined total score is 194. So the suitable equation is,
x+2x+2x+4 = 194
Solving the equation we get,
5x+4 = 194
5x = 194-4
5x = 190
x = 190/5
x = 38
So the score in geography = 38
the score in economics = 2x = 2*38 = 76
the score in science = 2x+4 = 2*38+4 = 76+4 = 80
Hence the scores of geography, economics and science are 38, 76, 80 respectively.
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A supply company manufactures copy machines. the unit cost C (the cost in dollars to make each copy machine) depends on the number of machines made. If x machines are made, then the unit cost is given by the function C(x)=0.8x^2-208x+21,619. What is the minimum unit cost?
The minimum unit cost is 8099.
Given:
A supply company manufactures copy machines. the unit cost C (the cost in dollars to make each copy machine) depends on the number of machines made. If x machines are made, then the unit cost is given by the function.
C(x)=0.8x^2-208x+21,619
derivative of C(x):
C'(x) = 0.8*2 x - 208+0
0 = 1.6 x - 208
1.6x = 208
divide by 1.6 on both sides
x = 208/1.6
= 208/16/10
= 208*10/16
= 2080/16
= 1040/8
= 520/4
= 260/2
x = 130
C(130) = 0.8*130^2-208*130+21619
= 16900*0.8 - 27040 + 21619
= 13520 - 5421
= 8099
Therefore the minimum unit cost is 8099.
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2) Martin built an outdoor enclosure for his cats. He plans to wrap the frame with wire
mesh that is the same height as the enclosure. The frame is 48 inches wide and 62
inches long. Wire mesh is sold in rolls that are each 10 ft long.
a. What is the perimeter of Martin's cat enclosure? (1)
b. How many bundles will Martin need to buy? (1)
c. How much of the wire mesh will be left over when he's done his project? (1)
a) The perimeter of Martin's cat enclosure is 220 inch.
b) Martin need to buy 22 bundles each 10 ft long.
Define perimeter of rectangle.The whole distance that a rectangle's boundaries, or its sides, cover is known as its perimeter. Given that a rectangle has four sides, the perimeter of the rectangle will be equal to the sum of its four sides.
Given,
Wide = 48 inches
Length = 62 inches
a) Perimeter of enclosure:
2 × (length + width)
2× (48 + 62)
2 × 110
220
The perimeter of Martin's cat enclosure is 220 inch.
b) Wire mesh is sold in rolls that are each 10 ft long.
Dividing it by perimeter:
220 ÷ 10
22
Martin need to buy 22 bundles each 10 ft long.
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help meeeeeeeeeeee pleaseee rnnnnn!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
The complete table of values is:
x -2 -1 0 1 2
y 1/9 1/3 1 3 9
How to complete the table of values?From the question, we have the following equation:
f(x) = 3ˣ
From the table of values, we have the following x values
x = -2, -1, 0, 1 and 2
Substitute x = -2, -1, 0, 1 and 2 in the equation f(x) = 3ˣ
When x = -2
f(-2) = 3⁻² = 1/9
When x = -1
f(-1) = 3⁻¹ = 1/3
When x = 0
f(-1) = 3⁰ = 1
When x = 1
f(1) = 3¹ = 3
When x = 2
f(2) = 3² = 9
Hence, the complete table of values is:
x -2 -1 0 1 2
y 1/9 1/3 1 3 9
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the school is fundraising committee is hosting a BBQ dinner. They sell meal tickets for 8.50 per dinner and recevive a 200 dollar donation. How many meal tickets do they need to sell inorder to raise at least 2,000 dollars
Atleast 212 meal tickets need to sold to raise atleast $2,000 as fund.
Given:
Meal tickets for 8.50 per dinner
Donation = $200 donation
To raise at least = $2000
To find the number of meal tickets to be sold for raise at least $2000
Now, According to the question:
Based on the given condition:
$(8.50 x n + 200) = $2,000
=> 8.5n + 200 = 2,000
=> 8.5n = 2,000 - 200
=> 8.5n = 1,800
n = 1800/8.5
n = 211.76
n ≅ 212 {as tickets sold in integers }
Hence, Atleast 212 meal tickets need to sold to raise atleast $2,000 as fund.
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If h(x)=6x+8 then h-'(x) = ?
The inverse of the given function is, h^(-1)(x) = (x - 8)/6.
What is inverse of function?
What a function's inverse function is F is a function that reverses what F did. The inverse of f is represented by f-1 if it exists and only if f is a bijective function.
Consider, the given function
h(x) = 6x + 8
Let,
y = 6x + 8
Replace x with y,
x = 6y + 8
Solving the equation for y,
x - 8 = 6y
y = (x - 8)/6
Replace y with h^(-1)(x),
So,
h^(-1)(x) = (x - 8)/6.
Hence the inverse of the given function is, h^(-1)(x) = (x - 8)/6.
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A tudent olve the following equation and determine that the olution i −2. I the tudent correct? Explain. 3
a 2
−
6a
a2 − 4
=
1
a − 2
a = -2 is the value of linear equation .
What are examples of linear equations?
An equation with only one variable is referred to as a linear equation in one variable. It has the mathematical formula Ax + B = 0, where A and B can be any two real numbers, and x is an unknowable variable with just one possible value. One such linear equation in one variable is 9x + 78 = 18.Step 1 - Write the equation.
3/a + 2 - 6a/a² - 4 = 1/a - 2
Step 2 - rewrite the equation.
3/a + 2 - 6a/a² - 4 = 1/a - 2
Step 3 - Take the LCM.
3(a- 2) - ( a + 2 )/a² - 2² = 6a/a²-4
Step 4 - Further simplify the above expression
3a - 6 - a - 2/a² - 4 = 6a/a² - 4
Step 5 - Cancel out the denominator of both sides and then further simplify.
2a - 8 = 6a
a = -2
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The complete question is -
A student solves the following equation and determines that the solution is −2. Is the student correct? Explain.
3/a + 2 − 6a/a2 − 4 = 1/a − 2
6) Find the area of the parallelogram.
B
10 cm
8 cm
15 cm
150cm² is the area of the given parallelogram.
How to find the area of the parallelogram?A parallelogram is a two-dimensional object with four sides. The opposing sides of a parallelogram are equal and parallel to one another. The amount of square units (such as m2, cm2, etc.) that may fit inside a parallelogram is the straightforward method for estimating the area of a parallelogram. Multiply the perpendicular base by the parallelogram's height to determine its area. It is important to understand that while the parallelogram's base and height are perpendicular to one another, its lateral side is not.So we understand that Rectangles are parallelograms.
They have the same formula for finding the perimeter and area.
Area = Length × Breadth15cm × 10cm= 150cm²Therefore, 150cm² is the area of the given parallelogram.
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Jaspir invested £2400 for years in a savings account.
He was paid 7.5% per annum compound interest.
At the end of the years he had £3445.51 in the savings account.
Work out the value of n
The value of n is 1, compound interest of the end of year.
What is compound interest?
The interest on savings that is computed on both the initial principal and the interest accrued over time is known as compound interest. Compound interest is calculated by multiplying the starting principal amount by one and the annual interest rate raised to the number of compound periods minus one. The final step is to deduct the initial loan principal from the calculated value.
When the amount compounds quarterly, it means that the amount compounds 4 times in a year. i.e., n = 4. We use this fact to derive the quarterly compound interest formula. Thus, the quarterly compound interest formula is:
A = P (1 + r/4)4t
where S= Amount at the end of n years = 3445.51
P = Principal = 2400
r = Rate of interest = 0.075
n = 1 as interest is compounded annually
Try to find it's value by solving. The number of years will be provided.
Hence the value of n is 1.
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| 2d = 8f
18 - 4f = 2d
Luigi uses 39 mozzarella pearls (small cheese balls) for every 6 pizzas they make.
Complete the table using equivalent ratios.
Pearls
39
13
Pizzas
6
4
The equivalent ratio of Pearls to Pizzas would be 13:2 and 13:4.
What is the ratio?
A ratio is an ordered pair of numbers a and b, denoted by the symbol a / b, where b does not equal zero. A proportion is an equation that sets two ratios equal to each other. For example, if there is one boy and three girls, the ratio could be written as 1: 3. (for every one boy there are 3 girls)
Luigi uses 39 mozzarella pearls for every 6 pizzas they make.
So the equivalent ratio would be 39/6
= 13:2
And similarly, Luigi uses 13 mozzarella pearls for every 4 pizzas they make.
So the equivalent ratio would be 13/4
= 13:4
Hence, the equivalent ratio of Pearls to Pizzas would be 13:2 and 13:4.
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Find the slope of the line that passes through (40, 89) and (28, 7).
Simplify your answer and write it as a proper fraction, improper fraction, or integer.
The slope of the line passes through the point (40,89) and (28,7) is [tex]\frac{41}{6}[/tex].
What is slope?
It is possible to determine a line's direction and steepness by looking at its slope. Without using a compass, determining the slope of lines in a coordinate plane can assist forecast whether the lines are parallel, perpendicular, or none at all. The slope of any line can be computed using any two distinct locations on the line. Calculated using the slope of a line formula, the ratio of "vertical change" to "horizontal change" between two different locations on a line is determined.
Here the given points are
[tex](x_1,y_1)=(40,89)\\(x_2,y_2)=(28,7)[/tex]
Now using slope formula ,
=> Slope m = [tex]\frac{y_2-y_1}{x_2-x_1}[/tex]
=> slope m = [tex]\frac{7-89}{28-40}[/tex]
=> slope m=[tex]\frac{82}{12}[/tex]
=> slope m = [tex]\frac{41}{6}[/tex]
Hence slope of the line passes through the point (40,89) and (28,7) is [tex]\frac{41}{6}[/tex].
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) dave will swim one day, run one day, and bike another day in a week. he does at most one activity on any particular day. how many ways are there for him to select his workout schedule (i.e. which activities he does which days)?
First Dave picks his swimming day, then his running day, and then his biking day. Since each activity is different, the order in which he selects the days matters. Therefore the number of selections is P(7, 3).
What is probability?Simply put, probability is the likelihood that something will occur. When we don't know how an event will turn out, we can discuss the likelihood or likelihood of various outcomes. Statistics is the study of events that follow a probability distribution. The probability is calculated by dividing the total number of possible outcomes by the number of possible ways the event could occur. Probability and odds are two distinct ideas. Odds are calculated by dividing the likelihood of an event by the likelihood that it won't. It is based on the likelihood that something will occur. The justification for probability serves as the main foundation for theoretical probability. For instance, the theoretical chance of getting a head when tossing a coin is 1/2.
Here,
He does 3 activities in 7 days,
P(7,3) is the ways to select the schedule.
Dave chooses his swimming, running, and biking days in that order. The sequence in which he chooses the days is important because each activity is distinct. Consequently, P is the number of choices (7, 3).
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5/6 divited by -3 1/3
Answer:
0.00896057348
Step-by-step explanation:
maybe I think I read it right but don't count on me
Answer: 1/4
Step-by-step explanation: If you divide them both you get 0.25 and that's just 1/4. Hope it helps.
Divide the following polynomial using synthetic division, then place the answer in the proper location on the grid. Write answer in descending powers of x. (x 4 - 81) (x - 3).
The final polynomial equation after synthetic division is [tex]x^5-3x^4-81x+243[/tex]
We need to solve;
Put the solution in the appropriate spot on the grid after using synthetic division to divide the following polynomial. Respond with descending powers of x.
The polynomial equation given is;
[tex]\left(x^4-81\right)\left(x-3\right)[/tex]
By using synthetic division;
⇒ [tex]x^4x+x^4\left(-3\right)-81x-81\left(-3\right)[/tex]
[tex]x^5-3x^4-81x+243[/tex]
→ The required final equation in descending powers of x is [tex]x^5-3x^4-81x+243[/tex] .
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Multiply 5c(9 − 4c).
Answer:
45c−20c2
Step-by-step explanation:
have great day
There are two answers.
The value of x is 7 and the value of y is 37. These values of x and y results in congruence.
For the two triangles, Δ LMN and Δ PQR,
Side LM = Side PQ,
Side LN = Side PR
Side MN = Side QR
⇒ Δ LMN and Δ PQR are congruent by (S.S.S : side side side) property
Since both the triangles are congruent to each other. There corresponding angles will be equal.
i.e. ∠ L = ∠ P, ∠ N = ∠ R and ∠ Q = ∠ M.
⇒ ∠ L = ∠ P
⇒ 3x + 24 = 8x - 11
⇒ 24 + 11 = 8x - 3x
⇒ 5x = 35
⇒ x = 7
In Δ PQR, sum of all angles is 180°
⇒ ∠P + ∠Q + ∠R = 180°
⇒ (8x - 11)° + 84° + ∠R = 180°
⇒ (8×7 - 11)° + 84° + ∠R = 180°
⇒ 45° + 84° + ∠R = 180°
⇒ 129° + ∠R = 180°
⇒ ∠R = 180° - 129° = 51°
We know that ∠N = ∠R
⇒ (2x + y) = 51
⇒ (2×7) + y = 51
⇒ y = 51 - 14 = 37
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INVESTMENTS Niyati invested $1000 in a savings account with interest compounded annually. After two years the balance in the account is $1210. Use the compound interest formula A=P(1+r)t to find the annual interest rate, to the nearest percent.
The annual interest rate of Niyati's invested to accumulate the accrued amount is 10%.
How to determine the annual interest rate of a compound interest?The formula for calculating compound interest is expressed as;
A = P( 1 + r )^t
Where A is accrued amount, P is principal , r is interest rate and t is time.
Given the data in the question;
Principal P = $1,000Compounded annually n = 1Time t = 2 yearsAccrued amount = $1,210Annual interest rate r = ?To determine the annual interest rate, plug the given values into the equation and solve for r.
A = P( 1 + r )^t
r = (A/P)^1/t - 1
r = (( $1,210 / $1,000 )^1/2 ) - 1
r = (( 1.21 )^1/2 ) - 1
r = 1.1 - 1
r = 0.1
Now, convert rate as percentage.
r = 0.1 × 100%
r = 10%
Therefore, the annual interest rate is 10%.
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