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algol13
3 years ago
14

WILL GIVE BRAINLIEST TO WHOEVER ANSWERS CORRECTLY!!!

Mathematics
1 answer:
notka56 [123]3 years ago
5 0

C I believe is correct

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On an exam, Mafuyu scored in the 20th percentile. If there were 50 students in the class, how many students scored lower than he
Reptile [31]

Using the percentile concept, it is found that 10 students scored lower than he did.

<h3>What is the meaning of the percentile of a measure?</h3>

When a measure is in the xth percentile of a data-set, it is greater than x% of the measures and lesser than (100 - x)%.

In this problem, he scored on the 20th percentile, that is, higher than 20% of the 50 students. Then:

0.2 x 50 = 10.

10 students scored lower than he did.

More can be learned about percentiles at brainly.com/question/24495213

#SPJ1

6 0
2 years ago
Which student's work is correct? Explain please
Lunna [17]

Step-by-step explanation:

Wendy

-20 = x/2 + 7

-20 -7 = x/2 + 7 -7

-27 = x/2

-54 = x

x = -54

because it's math rule

8 0
3 years ago
Type the correct answer in the box. Use numerals instead of words. Tony bought a new car at a cost of $20,000. The value of the
Over [174]

9514 1404 393

Answer:

  A(x) = 20000(0.88)^x

Step-by-step explanation:

The general form of these exponential equations is ...

  A(x) = a·b^x

where 'a' is the initial value, and b is the annual growth factor. x is the elapsed time in years.

The growth factor is ...

  growth factor = 1 + growth rate

Here, the growth rate per year is -12%, so the growth factor is ...

  b = 1 -12% = 88% = 0.88

Of course, the initial value is a=20,000, so the equation is ...

  A(x) = 20000(0.88)^x

8 0
3 years ago
What is the sum of 2 1/2, 3 1/4, and 7?
sattari [20]
51/4 is the correct answer
8 0
3 years ago
Read 2 more answers
7. The bottom of a circular swimming pool
mote1985 [20]
<h2>Hello!</h2>

The answer is:

1017.88 square feet are blue.

<h2>Why?</h2>

To calculate how many square feet are blue, we need to calculate the area of the bottom of the circular swimming pool.

We need to remember that we can calculate the area of any circle using the following formula:

Area_{circle}=\pi radius^{2}

Now, we know that the diameter of the bottom is equal to 36 feet, so, we can calculate the radius of the bottom using the following formula:

diameter=2radius\\\\radius=\frac{diameter}{2}

So,

radius=\frac{36feet}{2}=18feet

Then, calculating the area we have:

Area_{bottom}=\pi radius^{2}=\pi 18ft^{2}=1017.88ft^{2}

Hence, we have that 1017.88 square feet are blue.

Have a nice day!

4 0
3 years ago
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