Please help me with this question

Answer:

Step-by-step explanation:

Using scientific notation, The value of  8x10⁹ is 8000000000

In scientific notation, the correct format is an x 10 b, where an is an integer or decimal number whose absolute value is more than or equal to one and less than ten, or 1 |a| 10. In order for the scientific notation to be mathematically identical to the original number, b must be a power of 10.

The given problem is written in scientific notation,

The multiplication of the given number will be-

8x10⁹ = 8000000000

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The tenth of a gram closest to it is 151.79 grams.

The flour's mass is 141.6 grams.

10.19 grams are added.

The amount of flour in the bag =141.6+ 10.19

= 151.79.

A physical quantity is mass. The weight of a body serves as the unit of mass measurement. It can be measured in normal mass quantities such grams, kilograms, and pounds. Although grams are used to measure smaller objects, the kilogram is the SI unit of mass.

In the metric measurement system, a gram is a unit of weight that is one thousandth of a kilogram. When something is extremely light, its weight is measured in grams.

Therefore, 151.79 grams of flour, to the nearest tenth of a gram, are in the bag.

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The angle of elevation of the sun from the ground to the top of a tree is 36°.

We are given that:

The sun from the ground to the top of a tree when a tree that is 10 yards tall casts a shadow 14 yards long.

Now by using the trigonometric identity .

tan θ = P / B

As figure is  given below .

AB =  Perpendicular = 10 yards

BC =  Base = 14 yards

Putting all the values in the trigonometric identity .

tan θ = 10 / 14

θ = 36°

Therefore, the angle of elevation of the sun from the ground to the top of a tree is 36°.

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Answer:

c.x=9sr=95

THATS THE ANSWER PO.

The value of the variable x will be 88. Then the length of the side RS will be 84.

A triangle is a three-sided polygon with three angles. The angles of the triangle add up to 180 degrees.

If two triangles are similar, then the ratio of the corresponding sides will remain constant.

Triangle BCD has the following side lengths: BC = 60, CD = 50.

Triangle RST has the following side lengths: RS = 11x-4, ST = 70.

The triangle BCD and RST are similar triangles. Then we have

RS / ST = BC / CD

11x - 4 / 70 = 60 / 50

11x - 4 = 84

11x = 88

x = 8

Then the length of the side RS will be

RS = 11x - 4

RS = 11 × 8 - 4

RS = 88 - 4

RS = 84

The value of the variable x will be 88. Then the length of the side RS will be 84.

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Answer:

Step-by-step explanation:

You want to know which trig functions on the given list have a value of zero.

Sine

The sine function is zero at x=0 and multiples of π.

Cosine

The cosine function is zero at x = π/2 and for odd multiples of π.

Tangent

The tangent function is zero at x=0 and multiples of π. It is zero in the same places the sine function is zero.

These values are zero:

These function values are something different:

Answer:

The mapping diagram above represents a function since there is one number in Set A (the input) where there is only one mapping to Set B (the output).

Step-by-step explanation:

For each number in set A, there is one mapping from set A (input) to set B (output), so the mapping represents a function.

NB. The relation is a function IF AND ONLY IF each input value has only 1 output value.

Answer:

242

Step-by-step explanation:

Answer:

$4,872.00

Step-by-step explanation:

Convert 8% into a decimal and multiply

$60,900.00 x 0.08 = $4,872.00

Using proportions, it is found that the total amount of cement, sand, and gavel required is of 55.2 cubic yards.

A proportion is a fraction of a total amount, and the measures are related using a rule of three. Due to this, relations between variables, either direct(when both increase or both decrease) or inverse proportional(when one increases and the other decreases, or vice versa), can be built to find the desired measures in the problem, or equations to find these measures.

The decimal equivalent to the mixed number 1 1/2 is given by:

1 + 1/2 = 1 + 0.5 = 1.5.

1.5 times 36.8 cubic yards is:

1.5 x 36.8 = 55.2.

The total amount of cement, sand, and gavel required is of 55.2 cubic yards.

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The percentage of the actual salary that actual mortgage is is 30%.

Percentage is the fraction of an amount that is expressed as a number out of hundred. Percentage is a measure of frequency. The sign used to show percentage is %.

In order to transform a number into a percentage, express it as a fraction of a total amount and multiply by 100. So, actual mortgage would be divided by actual budget, the fraction would then be multiplied by 100.

Percentage of actual salary that is actual mortgage  = (actual mortgage / actual salary) x 100

(1080 / 3600) x 100 = 30%

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The z-score of the value is -0.79

The given parameters are

Value = 86

Mean = 101

Standard deviation = 19

The z-score of the value is calculated using

z= (Value - Mean)/Standard deviation

This gives

z = (86 - 101)/19

Evaluate

z = -0.79

Hence, the z-score of the value is -0.79

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Based on the calculation below, the net income would have been 13,475 if income tax expense had been 23%.

The net income when the tax rate is 23% can be calculated as follows:

Income before tax = Income tax expenses at 25% tax rate / Tax tax rate = 4,375 / 25% = 17,500

Net income at 23% tax rate = Income before tax * (100% - Tax rate of 23%)

Net income at 23% tax rate = 17,500 * (100% - 23%)

Net income at 23% tax rate = 17,500 * 77%

Net income at 23% tax rate = 13,475

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(a) the domain of f would be an interval (−3,6]

(b) the range of f would be an interval (−6,3]

(c) the zero(s) of f are x = −0.5 and x=6.

(d) the value of f(-3.5) would be 2

(e) the intervals at (−3,3) which f is increasing

(f) the intervals at (3,6] which f is decreasing

(g) the values are (−3,−0.5] for which f(x) ≤0

(h) x = 3 which is a relative maximum point

(i) the value of x is 3 for which f(x) = 3

(j) the function would be positive if f(0)

The domain of the function includes all possible x values of a function, and the range includes all possible y values of the function.

The domain of the function shown in the graph is given by the set of values x that has a point on the graph.

In other words, by launching the graph onto the x-axis we will cover the interval (−3,6]

The range of the function shown in the picture is given by the set of values y that has a point on the graph.

In other words, by launching the graph onto the y-axis we will cover the interval (−6,3]

The zeros of the function are the x-intercepts of the function, so the zeros are x = −0.5 and x=6.

The value of f(-3.5) is given by the y- coordinate of the point of intersection of the graph with the vertical line x=-3.5 So, f(-3.5)≈2.

The function is increasing whenever the y- coordinate increases if we trace the graph in the direction of positive x values.

So, the graph is increasing on (−3,3), where x=3 corresponds to the x- coordinate of the turning point on the graph.

The function is decreasing whenever the y- coordinate decreases if we trace the graph in the direction of positive x values.

So, the graph is decreasing on (3,6].

The values of x where f(x) ≤0, correspond to the points where the graph is below the x-axis, so the values of x for which f(x) ≤0 are (−3,−0.5].

The relative maxima or minima are the x-coordinate points where the continuous function has a turning point, like x=3 which is a relative maximum point

.

There are no relative minimum points for the given function.

The value of x for f(x)=3 is the x- coordinate of the point of intersection of the graph with the horizontal line y=3

So, x≈3.

we will determine the  y = coordinate of the point of intersection of the graph with the vertical line

x=0, which is above 2, so f(0) is positive.

Therefore, the domain of the function is interval (−3,6], and the range of the function is interval (−6,3].

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The values of x in the inequalities are x< -2 and x < 4

Given the inequalities;

To determine the value of x for each, we have;

-3x + 2 < 8

collect like terms

-3x < 8 - 2

-3x < 6

Make 'x' the subject

x < 6/ -3

x< -2

1/2x - 5 < -3

Find the Lowest common multiple

x - 10 / 2 < -3

cross multiply

x - 10 < -3 × 2

x - 10 < -6

collect like terms

x < - 6 + 10
x < 4

Thus, the values of x in the inequalities are x< -2 and x < 4

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The domain of f(x) is all real numbers & satisfies function f(x+1)=2f(x).

For  x∈(0,1], the function f(x)=x(x-1). For value x∈(-[tex]\infty[/tex],m], f(x)≥[tex]\frac{-8}{9}[/tex]. What is the value of m?​

the smallest value m=[tex]\frac{7}{3}[/tex].

Given that, for x∈(0,1], f(x)=x(x-1)

Let's plot this function

We'll go from 0 to 1 and let's graph what this function is look like

f(x)=x(x-1) will be a parabola and it's going to go between the points (0,0) and (1,0).

Will graph it in figure1 we can see.

The minimum value of this parabola is right in the middle and it is

f(0.5)=-0.25

Now, let try and graph the function in the other intervals

We know f(x+1)=2f(x)

Now we can evaluate couple of points

f(0+1)=2f(x)

f(0.5+1)=2f(0.5)

f(1+1)=2f(1)

And we quickly deduce that the graph in(1,2] is twice the height of the graph in (0,1].

We will graph a parabola in figure 2 we can see.

This parabola is going to have a graph of 2 between its twice as tall and this can be multiplied by the quantity of (x-1) multiplied by the quantity of (x-2).

It is 2(x-1)(x-2).

We graph next interval twice the height of the graph in the interval from 2 to 3. We can see the graph in figure3.

This parabola will have an equation 4 times the quantity of (x-2) and (x-3).

We can also shift this graph to the left and it going to be half the height.

Looking at this graph we want f(x)≥[tex]\frac{-8}{9}[/tex].

In the 3 interval from 2 to 3 its going to intersect .

we want to look for the points where f(x)≥[tex]\frac{-8}{9}[/tex].

We are looking for m which f(x)≥[tex]\frac{-8}{9}[/tex].

parabolas equation =[tex]\frac{-8}{9}[/tex].

4(x-2)(x-3)=[tex]\frac{-8}{9}[/tex]

[tex]x^{2} -5x+6=\frac{-2}{9} \\(x-\frac{7}{3})(x-\frac{8}{3})=0\\ x= \frac{7}{3},\frac{8}{3}\\\\[/tex]

Therefore, We will take the smallest value m=[tex]\frac{7}{3}[/tex].

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Answer: 236 square inches

Step-by-step explanation:

Three 6" x 6" and two 8" x 8" electrical boxes are installed in a wall between two studs

The answer is 236

Answer:

d = -12

Step-by-step explanation:

[tex]3i-4-di = -4-11i+2i\\3i-4-di = -4-9i\\3i-\left(4-di\right)-3i = -4-9i-3i\\-\left(4-di\right)=-4-12i\\\frac{- 4 - di}{-1} = -\frac{4}{-1}-\frac{12i}{-1}\\\frac{-\left(4-di\right)}{-1}\\= \frac{\left(4-di\right)}{1}\\=4-id\\=\frac{- 4 - 12i}{-1}\\=-\frac{- 4-12i}{1}\\=-( - 4)-( - 12i)\\=-\left(-4\right)-\left(-12i\right)\\= 4 + 12i\\4-(id) = 4 + 12i\\4 - id - 4 = 4 + 12i - 4\\- id=12i\\\frac{-id}{-i} = \frac{12i}{-i}\\\frac{id}{i}\\= d\\- \frac{12i}{i}\\= - 12[/tex]

Mediante el uso de porcentajes, concluimos que la clase tiene una población total de 30 estudiantes.

En este problema tenemos a 12 estudiantes procedentes de una clase que participan en un evento cultural de su escuela y también se conoce que equivalen al 40 por ciento de su clase. El total de estudiantes de la clase se obtiene al dividir el número de estudiantes por el porcentaje:

x = 12 / 40 %

x = (12 · 100) / 40

x = 30

La clase tiene una población total de 30 estudiantes.

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Answer:

40

Step-by-step explanation:

For this equation, all we do is simply plug in the values.

-4 (c) (a)

-4 (-5) (2)

-4*-5*2

Now, multiply, and you get your answer.

-4 * -5 = 20

20 * 2 = 40

40 is your answer

Answer:

the second option

[–3, 6) ∪ (6, ∞)

Step-by-step explanation:

f(x) = 1/(x - 3)

the domain is every value of x that does not turn the denominator to 0. so, x <> 3.

g(x) = sqrt(x + 3)

the domain is every value of x that does not turn (x+3) into a negative value. so, x >= -3.

f(g(x)) = 1/(sqrt(x + 3) - 3)

the domain is all values of x that are valid for g(x) AND that do not generate range values of g(x) that violate the domain of f(x).

so, it is (x >= -3) AND (sqrt(x + 3) <> 3).

and sqrt(x + 3) = 3, if (x + 3) = 9.

that means x = 6.

so, 6 is forbidden, every other value of x is allowed here.

therefore, the domain of f(g(x)) is

(x >= -3) AND (x <> 6)

and that is equivalent to

[-3, 6) u (6, infinity)

everything larger or equal to -3 and different from 6.

Answer:

(7-8) / (-7/16) = -2 -(.8) + (1/4) = -.55 -2+ -.55= -2.55

Step-by-step explanation:

Answer:

1×32

2×16

4×8

8×4

16×2

32×1

Step-by-step explanation:

This question about arranging pictures is just trying to get you to explore the factors of 32, maybe for practicing the math ideas of factoring, or area, or max/min, or matrices.

Think of what numbers go into 32:

1, 2, 4, 8, 16, 32

Pair them up!

1×32 and 32×1 will look differently if they are pictures on a wall. So we'll list them separately. Then there's also 2×16 and 16×2, and 4×8 and 8×4.

The ratio of red cars to blue cars in a parking lot was 5:3, total blue cars are 24.

A ratio in mathematics shows how many times one number is included in another. For instance, if a dish of fruit contains eight oranges and six lemons, the ratio of oranges to lemons is eight to six. The ratio of oranges to the overall amount of fruit is 8:14, while the ratio of lemons to oranges is 6:8.

Given, the ratio is 5:3.

Total red cars = 40

⇒ 5x = 40

⇒ x  = 8

Blue cars  = 8 × 3

= 24

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6x³ + 2x² + 3x - 4 is not exactly divisible by x² + 3x - 4.

Given,

The expression : 6x³ + 2x² + 3x - 4

We have to divide the given expression by x² + 3x - 4.

Let's take 6x³ + 2x² + 3x - 4 as p(x) and x² + 3x - 4 as g(x).

If p(x) is divisible by the factors of g(x), then p(x) is divisible by g(x).

So, let's factorize  x² + 3x - 4

x² + 3x - 4 = (x - 1) (x + 4)

Now,

p(x) = 6x³ + 2x² + 3x - 4

By using remainder theorem,

If p(1) = 0 and p(4) = 0, then p(x) is divisible by g(x).

So,

p(1) = 6 × 1³ + 2 x 1² + 3 x 1 -4

p(1) = 6 + 2 + 3 - 4

p(1) = 11 - 4

p(1) = 7

Next,

p(4) = 6 x 4³ + 2 x 4² + 3 x 4 - 4

p(4) = 6 x 64 + 2 x 16 + 12 - 4

p(4) = 384 + 32 + 12 - 4

p(4) = 424

Here, p(1) and p(4) is not 0.

So, p(x) is not divisible by g(x).

That is, 6x³ + 2x² + 3x - 4 is not exactly divisible by x² + 3x - 4.

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Answer:

31/18 which is changed to 1³¹/¹⁸

Step-by-step explanation:

9/18+7/18+15/18 I found the lcm or the lowest common multiple of all the three and multiplied it by each fraction first then u can add all of them and put it over 18 or add each

It can be written as 13/35.

how do we rewrite a fraction.

Divide the numerator by the denominator

Write down the whole number result

Use the remainder as the new numerator over the denominator. This is the fraction part of the mixed number.

A number that will divide evenly into both the numerator and denominator so it can be reduced, or

The numerator must be greater than the denominator, (an improper fraction), so it can be converted to a mixed number

4/5-3/7

⇒4×7-3×5/ 35     ( 5 and 7 have no common divisor).

⇒ 28- 15/35

⇒13/35

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