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MAXImum [283]
3 years ago
7

Barbara answered 72 questions correctly on her test. If her score on the test was 80%, how many questions were on the test?

Mathematics
2 answers:
Pani-rosa [81]3 years ago
5 0
Answer is B - 90
-----
elena55 [62]3 years ago
5 0
For a percentage question setup is like this:
part = percentage * whole

part = 72
percentage = 80% = 0.8

72 = 0.8 * whole
whole = 72/0.8 = 90
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Each story of a building is 14.3 feet tall. If the height of the building is 185.9 feet, how many floors does the building have?
zvonat [6]

Answer:

D 13

Step-by-step explanation:

To find out how many floors the building has, we take the height of the building and divide by the size of each floor

floors = 185.9 ft / 14.3ft per floor

           = 13 floors

3 0
3 years ago
Read 2 more answers
Kayleigh wants to buy a car that costs $13,080.00. She deposits $12,000.00 into a savings account that earns 3% simple interest.
Ipatiy [6.2K]
The formula is
A=p (1+rt)
A cost of the car 13080
P amount deposited 12000
R interest rate 0.03
T time?
Solve for t
T=[(A/p)-1]÷r
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8 0
3 years ago
The graph shows the function f(x) = |x-h[ + k. What is
Olegator [25]

Answer:

K=-2.5

Step-by-step explanation:

because the line is in the middle of 2 and 3 and is below which means that it is negative

8 0
3 years ago
Read 2 more answers
I need some help with binomial theorems. can anyone help solve this?
Svetlanka [38]
Use Pascal's Triangle

1
1 1
1 2 1
1 3 3 1
1 4 6 4 1
1 5 10 10 5 1
1 6 15 20 15 6 1
1 7 21 35 35 21 7 1
1 8 28 56 70 56 28 8 1
1 9 36 84 126 126 84 36 9 1 (this is the row you use)

So, the seventh term of (3x + 2y)^9 will be 84xy
8 0
3 years ago
Read 2 more answers
Which graph represents the polar curve r = 4cos(30)?
stepan [7]

The equation of the polar curve r = 4\cos(3\theta) is an even cosine function.

<h3>Polar curves</h3>

In geometry, polar curves are curves that are represented by the polar coordinates such that they are drawn around a fixed point

The equation of the polar curve is given as:

r = 4\cos(3\theta)

To graph the polar curve, we make use of the following representations:

  • r represents the y-axis
  • \theta represents the x-axis

Using the above representation, we can graph the polar curve

See attachment for the graph that represents r = 4\cos(3\theta)

Read more about polar curves at:

brainly.com/question/4618020

8 0
2 years ago
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