Answer:
Random assignment is necessary for internal validity, whereas random assignment is necessary for external validity
Step-by-step explanation:
help meeeeeeeeeeee pleaseee rnnnnn!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
16/9, 4/3, 1, 3/4, and 9/16
Step-by-step explanation:
1.) Plug these x values into the equation. You will get: 16/9, 4/3, 1, 3/4, and 9/16.
Answer:
16/9, 4/3, 1, 3/4, and 9/16
Step-by-step explanation:
1.) Plug these x values into the equation. You will get: 16/9, 4/3, 1, 3/4, and 9/16.
Noreen can walk 13 mile in 12 minutes. What is her average speed in miles per hour?.
The average speed in miles per hour is 1.67 miles/hour
What is her average speed?
Average speed is calculated by dividing distance by time (eg miles/hour).
Given that, Noreen can walk 1/3 mile in 12 minutes.
We need to find her average speed.
We know that the total distance covered divided by the total time taken is called the average speed of Noreen.
Mathematically, it is given by :
v=d/t
t = 12 minutes = 0.2 hours
v=(1/3 mile)/0.2 hours
v = 1.67 miles/hour
So, the average speed of Noreen is 1.67 miles/hour. Hence, this is the required solution.
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The graph shows the distance traveled by an Olympic-level sprinter over time during a race.
Find the slope of the line, and complete the sentences below.
100 meter race graph of a diagonal line on a coordinate plane going up and to the right with Time in seconds on the x axis and Distance in meters on the y axis. The line begins at the origin and passes through the point 2 comma 20.
The slope of the line is 10.
Given:
The graph shows the distance traveled by an Olympic-level sprinter over time during a race.
The line begins at the line begins at the origin and passes through the point (2,20).
slope between (0,0) and (2,20).
slope m = y2 - y1 / x2 - x1
= 20 - 0 / 2 - 0
= 20/2
= 10.
Therefore the slope of the line is 10.
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This item has two parts: Part A and Part B. Use the information and table to complete Part A and Part B.
Jennifer’s bank account is modeled by the following equation where x equals the number of weeks and f(x) equals the total balance.
f(x) = 12x + 45
The balance of William’s bank account is modeled in the table.
Weeks 0 1 2 3 4
Total Balance ($) 30 44 58 72 86
Part A
What function represents the balance of William’s bank account?
g(x) = 14x + 30
g(x) = 30x
g(x) = 30x + 14
g(x) = 14x
Part B
Jennifer claims that her bank account is growing at a greater rate of change than William’s bank account. Is Jennifer CORRECT?
No, because her rate of change is $ 45 per week which is less than William’s rate of change.
Yes, because her rate of change is $ 12 per week which is more than William’s rate of change.
Yes, because her rate of change is $ 45 per week which is more than William’s rate of change.
No, because her rate of change is $ 12 per week which is less than William’s rate of change.
Answer:
A) g(x) = 14x + 30
B) The last explanation
No, because her rate of change is $12 per week which is less than William's rate of change.
Step-by-step explanation:
A:
At the beginning William as 30 dollars (0,30) Week zero he has 30. Then each week, his balance goes up 14 dollars
g(x) = 14x + 30
B:
Jennifer's bank account is increasing by 12 dollars a week, but William's is increasing 14 dollars a week.
if you are conducting an experiment where the probability of a success is .02 and you are interested in the probability of two successes in 15 trials, the correct probability function to use is the . a. normal probability density function b. binomial probability function c. poisson probability function d. standard normal probability density function
When conducting an experiment with the probability of a success of 0.02 and you are interested in the probability of 2 successes in 15 trials, the correct probability function to use is the binomial probability function. (Option B)
Binomial probability function, in probability theory and statistics, refers to the discrete probability distribution of the number of successes in a sequence of repeated independent experiments. Generally, the binomial distribution represents data generated from a yes–no question, and each with its own Boolean-valued outcome: success or failure. As the experiment where probability of success is given and you are interested in the probability of 2 successes in 15 trials, the appropriate probability function is binomial probability function.
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Johnson had 22,000 shares in a blue chip company before a stock split of 2:1. How many shares does Johnson have after the stock split?
Answer:
44,000 shares in a blue-chip company
Step-by-step explanation:
So since Johnson had 22,000 shares in a blue-chip company and it split 2:1, we multiple the beginning number of shares by 2 because they split into 2 different shares.
22,000*2=44,000
What is the value of the expression?
Drag and drop the answer into the box to match the expression.
0.3(14−1)+0.35
A -0.575
B -0.125
C 0.125
D 1.925
E 1.4
Work out the area Give your answer in cm² and give any decimal answers to 1 d.p.
53 cm
28 cm
The triangle's surface area is 630 cm²
What is the Pythagorean theorem in plain English?
Pythagoras' Theorem states that the square of the hypotenuse side in a right-angled triangle is equal to the sum of the squares of the other two sides. The Perpendicular, Base, and Hypotenuse are the names of this triangle's three sides.
Given that
hypotenuse is 53 cm
base is 28 cm
and it is a right angle triangle
Area = 1/2 x Base x height
So by using Pythagorean theorem we can find its height
Height² + Base² = Hypotenuse²
Height² + 784 = 2809
Height² = 2024
Height = 45 cm
Area = 1/2 x 28 x 45
Area = 630 cm²
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The area of a rectangle is 44 square inches . The length of one side is 11 inches.what is the length of the other side
Answer:
Step-by-step explanation:
A = 44
a = 11
______
b - ?
A = a·b
b = A / a = 44 / 11 = 4 ( inches)
The beta for the DAK Corporation is 1.25. The yield on 30-year T-bonds is 5.65 percent, and the long-term average return on the S&P 500 is-11 percent. Calculate the required rate of return for DAK Corporation. I
The required rate of return for DAK Corporation is 12.34%.
What is the required rate?
The minimal profit (return) an investor will seek or expect in exchange for taking on the risk of investing in a stock or other type of security is known as the required rate of return (RRR). RRR can also be used to determine a project's potential profitability in relation to its funding costs.
Here, we have
Given Information
Beta = 1.25
The yield on 30-year T bonds (rf)= 5.65%
Return on S&P (rM) = 11%
Required Return for DAK = rf + Beta*(rM - rf)
= 5.65% + 1.25*(11% - 5.65%)
= 12.34%
Hence, the required rate of return for DAK Corporation is 12.34%.
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Harper needs to mail an envelope. She weighs it at home as 10.4 ounces. When she gets to the post office, the clerk weighs it at 9.6 ounces. What is the percent error in the weight of the envelope
The percent error in the weight of the envelope is 7.69%.
What is the percentage?Given that Harper weighs it at home as 10.4 ounces and then when she gets to the post office, the clerk weighs it at 9.6 ounces.
The percentage error will be:
= Change in value / Original value × 100
= (10.4 - 9.6) / 10.4 × 100
= 0.8 / 10.4 × 100
= 7.69%
The percentage is 7.69%.
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PLEASE HELP ASAP
Given 2 and 1 over 10 times negative seven times 5 over 12, determine the product.
negative fourteen and 5 over 120
negative six and 1 over 8
fourteen and 5 over 60
six and 1 over 8
Answer:A
Step-by-step explanation:negative fourteen and 5 over 120
Because you multiple
2 x -7 = -14
10 x 12 = 120
1 x 5 = 5
what is
9e-7=7e-11
e=?
Answer:
-2
Step-by-step explanation:
9e-7=7e-11
9e-7e= -11+7
2e= -4
e= -4÷2
e= -2
consider the function f(x) =3x+8, What is the correct set up for f(x)=7?
Answer: 29
Step-by-step explanation: 3 times 7 = 21 + 8 = 29
Answer:
7=3x+8
x=-1/3
Step-by-step explanation:
we just replace f(X) with 7
7=3x+8
-8. -8
-1=3x
/3. /3
-1/3=x
Hopes this helps please mark brainliest
Find the length of, side x in simplest radical form with a rational denominator.
The side x is √2 cm when the right angle triangle is given with hypothesis 2 cm.
Given that,
In the picture we have a right angle triangle.
We have to find the side x.
The angles are 90°, 45° and 45°.
The hypothesis is 2cm.
By the trigonometric ratio.
The study of angles and the angular relationships between two-dimensional and three-dimensional shapes is known as trigonometry.
Sin45°= opposite side/ hypothesis
1/√2= x/2
x=2/√2
x=√2
Therefore, The side x is √2 cm when the right angle triangle is given with hypothesis 2 cm.
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Calculate P(3, 2)
12
8
7
6
Answer: the answer is number 6
Social Security tax: 6.2%. Maximum: $106,800. Medicare tax: 1.45%
In 2009, Dr. Kirmser's gross pay was $381,318.60.
What was her monthly gross pay?
Dr. Kirmser's monthly gross pay = $ 29345.65
Social Security tax:Employers and workers are both subject to the Social Security tax, which is used to pay for the country's Social Security program. Federal Insurance Contributions Act (FICA)-mandated payroll taxes or Self-Employed Contributions Act-mandated self-employment taxes are the two ways that Social Security tax is collected (SECA).
Here we have
In 2009, Dr. Kirmser's gross pay was $381,318.60.
Social Security tax = 6.2% [ Maximum: $106,800 ]
=> 6.2% = 6.2/100 = 0.062
Medicare tax = 1.45%
=> 1.45% = 1.45/100 = 0.0145
From the above information,
Total tax on salary =0.062 + 0.0145 = 0.0765
In 2009, Dr. Kirmser's gross pay was $381,318.60.
Tax can be calculated on Gross pay = 0.0765 × $381,318.60
= 29170.827
As we know
Net pay = gross salary - deductions
=> Monthly gross pay = $381,318.60 - $29170.827 = $ 352147.773
Therefore,
Dr. Kirmser's monthly gross pay = 352147.773 ÷ 12 = $ 29345.65
Hence,
Dr. Kirmser's monthly gross pay = $ 29345.65
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The price of an item yesterday was $80. Today, the price rose to $216. Find the percentage increase.
Answer:
170%
Step-by-step explanation:
increase in price = 216 - 80 = $136
x : 100 = 136 : 80
x = 100 * 136 / 80
x = 10 * 136/8
x = 1360 / 8
x = 170 %
Answer:
170%
Step-by-step explanation:
80+170%=$216
Using the figure below, which table correctly lists the steps and reasons used to find the measure of angle d?
The correct option is (c).
(A) We know that sum of the interior angles of a triangle is equal to 180°.
m∠a + m∠b + m∠c = 180° (all three are interior angles)
(B) If the sum of two angles is 180°, that angle is called a supplementary angle. In other words, when two angles add to form a straight line, they are called supplementary angles.
m∠d + m∠c = 180° (both are in a straight line making an angle)
(C) Transitive properties help establish a connection by stating that if a = b and b = c, then a = c.
m∠a + m∠b + m∠c = 180°
m∠d + m∠c = 180°
Therefore, this property
We can say,
m∠a + m∠b + m∠c = m∠d + m∠c
(D) Subtraction equality properties: Subtraction equality properties indicate that subtracting or removing an equal value from two equal elements results in a new equal quantity.
The formula for this is if a = b, then a-c = b-c
In the question,
m∠a + m∠b = m∠d
Both ∠a and ∠b are two interior angles and the exterior angle is ∠d.
According to the exterior angle property of a triangle theorem, the sum of two opposite interior angles is equal to exterior angles.
Hence, this is also correct.
Therefore, the correct option is (c) which has the correct steps and reasons for the given question.
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When abram was born, his parents put $2,000 into an account that yielded 1. 2% interest, compounded semi-annually. When he turns 16, his parents will give him the money to buy a car. How much will abram receive on his 16th birthday?.
In linear equations, $ 309.914 will abram receive on his 16th birthday .
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 formula Ax + B = 0, with A and B being any two real numbers and x being an ambiguous variable with just one possible value. A linear equation in one variable would be 9x + 78 = 18, for instance.Let “M” be amount of money in account.
Let “y” be number of full years passed.
1.2/2 = 0.6(%) - interest for every 6 months
y = 16
Money in the account in 16 years:
M = 2,000(1.006)2y
= 2,000(1.06)32
= 2000 * 0.154957
= $ 309.914
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Find the percentage error of the mass of a bag of sugar that weighs 10.00kg, correct to 2 decimal places.
The percentage error of the mass of a bag of sugar that weighs 10.00kg is 0.1%
The mass of a bag of sugar that weighs = 10.00 kg
The possible error measurements are 10.01, 10.02 etc
The least count error in the measurements = 0.01
The percentage of error = (The least count error in the measurements / The mass of a bag of sugar that weighs ) × 100
Substitute the values in the equation
The percentage of error = (0.01 / 10) × 100
Divide the terms
= 0.001 × 100
Multiply the terms
= 0.1%
Hence, the percentage error of the mass of a bag of sugar that weighs 10.00kg is 0.1%
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The table shows the amount of dietary fiber in bananas. Use the table to find the constant of proportionality. Express your answer in decimal form.
Dietary fiber (g) 9.3 18.6 27.9 37.2
Servings 3 6 9 12
The Constant Of Proportionality Is 3.1
A per the table,
Amount of dietary fiber in 3 servings of banana = 9.3 grams
Amount of dietary fiber in 6 servings of banana = 9.3 grams
Amount of dietary fiber in 9 servings of banana = 9.3 grams
Amount of dietary fiber in 12 servings of banana = 9.3 grams
We need to find
The constant of proportionality.
We know that the constant of proportionality is a constant number that represents the rate at which ratios of a quantity decrease or increase.
Let the constant of proportionality be, k.
So, k = x/y
Where,
x = Quantity
y = Total Number of the quantity.
Ratio 1 = 9.3/3 = 3.1
Similarly,
Ratio 2 = 18.6/6 = 3.1
Ratio 3 = 27.9/9 = 3.1
Ratio 4 = 37.2/12 = 3.1
since all the ratios are equal;
Hence, The Constant Of Proportionality Is 3.1
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If Q(t)= C/4t - 1 an equation for Q-¹(t) is
If Q(t)= C/4t - 1 an equation for Q-¹(t) is y = C + t/4t.
Define equation.A mathematical expression with an equals sign is referred to as an equation. Algebra is widely used in equations. When performing calculations but unsure of the precise amount, algebra is used.
Given,
Q(t) = C/4t -1
Put a "y" in place of the "Q(t)":
y = C/4t -1
Change the t and y since each (t, y) has a corresponding (y, t) companion.
t = C/4y -1
Distribute t by multiplying into the bracket to find y.
t × 4y -1 = C
t × 4y - t = C
Add both sides of the equation together now.
t × 4y = C +t
4t divided by both sides
y = C + t/4t
If Q(t)= C/4t - 1 an equation for Q-¹(t) is y = C + t/4t.
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this picture will answer a question. Question: During what interval(s) of the domain is the baseballs height increasing?
(btw you have to write the answer, there is no multiple choice)
Answer:
(0,2)
It increases at the beginning. From 0 to 2 on the x axis
if a person usually ate 2 ounces of lean meat at lunchtime and decided to substitute cooked lentils instead, how much of the lentils would the person need to eat?
If a person substitutes 2 ounces of lean meat by cooked lentils, the lentils that the person need to eat is ½ cup as both are protein.
Lean meat and lentils are among the sources of proteins in the food intake. Protein is found throughout the human body such as in muscle, skin, hair, bone, skin, hair, and every other body part or tissue. It manufactures the enzymes that power chemical reactions and the hemoglobin that carries oxygen in your blood. Protein is required by the body to help your body repair and make new cells. The foods that contain high content of proteins include lean meat, eggs, dairy products, lentils, etc. A half cup of cooked lentils provides 9 grams of protein, and 2 ounces of lean meat provides 8 grams of proteins. As the amount of protein provided by both is similar, a person can substitute one with another and maintain their protein intake.
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The monthly property tax for a home, in dollars, in a certain city y years after 1990 is $333 + $35y
Which of the following is correct?
OA. The property tax increased by $333 each year after 1990.
OB. The property tax decreased by $333 each year after 1990.
OC. The property tax increased by $35 each year after 1990.
OD. The property tax decreased by $35 each year after 1990.
Answer:
The property tax increases by 35
Step-by-step explanation:
The number 333 in the equation is a constant. It is added to the total no matter how many years after 1990. The 35 is what is increasing every year after 1990.
HELP ASAP!!!!!!
In this situation, simple interest is calculated yearly.
How much interest was earned?
Principal: $8000
Time: 4 years
Interest rate: 12%
The simple interest accumulated on the principal at 12% rate for 4 years is $3,840.
How to determine interest accumulated?Simple interest formula is expressed as;
I = P × r × t
Where I is interest, P is principal, r is interest rate and t is time.
Given the data in the question;
Principal P = $8000Elapsed time t = 4 yearsInterest rate r = 12%Interest I = ?First, convert the interest rate from percent to decimal.
Interest rate r = 12%
Interest rate r = 12/100
Interest rate r = 0.12
Plug the given values into the above formula and solve for interest I.
I = P × r × t
I = $8000 × 0.12 × 4
I = $3,840
Therefore, the interest earned is $3,840.
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What is the intermediate step in the form (x+a)^2=b(x+a) 2 =b as a result of completing the square for the following equation? x^{2}+32x+116= x 2 +32x+116= \,\,12x 12x
The intermediate step of equation x^{2}+32x+116=0 is (x + 16)² = 140
In this question, we have been given an equation x^{2}+32x+116=0
We need to find the intermediate step in the form (x + a)^2=b as a result of completing the square for the given equation
We can write given equation as,
x^{2}+32x= -116
Take the coefficient of x
k = 32
Divide it by 2
k/2 = 16
Square both sides
(k/2)^2 = 256
Add 256 to both sides of x² + 32x = -116
x² + 32x + 256 = -116 + 256
(x + 16)² = 140
Therefore, the intermediate step of equation x^{2}+32x+116=0 is (x + 16)² = 140
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Find the equation for the line of best fit for the scatter plot shown below.
Answer Choices:
y=1.5x+0.5
y=1.5x+4.5
y=1.5x+5
The equation for the line of best fit of the scatter plot according to the attached image is; y = 1.5x + 0.5.
What is the equation of the line of best fit of the scatter plot given?It follows from the task content that the equation of the line of best fit of the scatter plot is to be determined.
By observation, it can be inferred that the y-intercept of the line of best fit is at the point; (0, 0.5).
Also, the slope of the equation can be determined by considering the points; ( 2 , 1 ) and ( 9 , 12 ).
Therefore, since the slope is given by; m = (y2 - y1) / (x2 - x1).
In this scenario, slope, m = (12 - 1) / (9 - 2)
m = 11/7.
Hence, the slope is approximately; 1.5.
Ultimately, the equation of the line of best fit is; y = 1.5x + 0.5.
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You have 2 different savings accounts. For Account A, the simple interest earned after 9 months is $6.94. For
Account B, the simple interest earned after 33 months is $39.60. If the interest rate is 3.7% for Account A and 2.4% for
Account B, how much is the principal in each account? Which account earned you the most interest the first month? Explain
The principal amount in account A was $250.09 and in account B it was $600.
Account B earned you the most interest the first month because $1.2 is higher than $0.7711.
What is the simple interest?
Simple interest is a quick and easy way to calculate the interest charge on a loan. Simple interest is calculated by multiplying the daily interest rate by the principal by the number of days between payments.
The formula for simple interest is expressed as
I = PRT/100
Where, P = the principal or initial amount of money invested.
R = interest rate
T = time
On account A,
I = $6.94
R = 3.7%
T = 9 months = 9/12 = 0.75 years.
Using the formula:
I = PRT/100
[tex]6.94 = \frac{P(3.7)(0.75)}{100} \\\\6.94 = 0.02775P\\\\P=250.09[/tex]
On account B,
I = $39.60
R = 2.4%
T = 33 months = 33/12 = 2.75 years
Using the formula:
I = PRT/100
[tex]39.60= \frac{P(2.4)(2.75)}{100} \\\\39.60 = 0.066P\\\\P=600[/tex]
To find the account that earned more interest in the first month we have to divide the interest by the number of months.
For account A,
6.94/9 = $0.7711
For account B,
39.60/33 = $1.2
Hence, the principal amount in account A was $250.09 and in account B it was $600.
Account B earned you the most interest the first month because $1.2 is higher than $0.7711.
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