MATHEMATICS MIDDLE SCHOOL

The center of a soccer field has an area of 100\pim squared. Find the circumference of the center circle.

Answers

Answer 1
Answer: The formula for the area of a circle is A=πr². To find the circumference, we must find the radius, r. To do this, we plug in the area for A in the first formula, then plug it in to the circumference formula:
100 \pi = \pi r^(2) \n (100 \pi )/( \pi ) = ( \pi r^(2) )/( \pi ) \n 100= r^(2) \n √(100)= \sqrt{r^(2) } \n r=10m

Now we know that r=10 meters. Now we plug this into the circumference formula, C=2πr.
C=2 \pi 10 \n C=20 \pi

The answer is 20π meters.

Hope this helps!

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Susan sold half of her comic books and then bought 8 more She now has 13. How many did she begin with

Answers

Answer16

Step-by-step explanation:

8*2=16
She began with 10 books
Half of 10 is 5
Then she bought 8
Now she has 13

Which number has the same value as 20 tens

Answers

200 has the same value as 20 tens

You need 2 eggs for a muffin recipe that makes 12 muffins. If you want to make 36 muffins, what should you do?

Answers

Solve:-

36  ÷ 12 = 3
3 batches of 12 muffins each.

2 × 3 = 6
You will need 6 eggs to make 36 muffins, when using 2 eggs per 12 muffins.

CHECK OUR WORK:-

6 / 2 = 3
We were RIGHT!!!!

So, to make 36 muffins you need 6 eggs.
Solve:-

36  ÷ 12 = 3
3 batches of 12 muffins each.

2 × 3 = 6
You will need 6 eggs to make 36 muffins, when using 2 eggs per 12 muffins.



6 / 2 = 3

So, to make 36 muffins you need 6 eggs.

a value of 500 increases by 12%. Write and equation that could be used to find the new value. What is the new value?

Answers

500×12%
(500×12)÷100
6000÷100
=60

so,
500+60=560

A sail on a sailboat is a triangle with two sides perpendicular and each side is a different length. What are the two terms that could be used to describe the sail?

Answers

right triangle or equilateral(not sure if i spelled it right) triangle

Derrick earned 1472 during the 4 weeks he had his summer job. If he earned the same amount each week, how much did he earn each week?

Answers

368 he earned each week.

During the 4 weeks he earned 1472, to be able to know the amount he earn each week. We simply, divide 1472 into 4 because in a month there are 4 weeks. In dividing,1472/4 = 368. The above answer is correct.
Hey there, 

The correct answer is $368. 

We know that Derrick earned 1472 during the 4 weeks he had his summer job. 

1472/4 = 368
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