Question

If 25% of a number is 100, what is the number?

OA.
50
B.
100
O C.
150
D.
200
o E.
400

Answer 1

E. 400

Explanation:

So this is how we set this up, and how we solve

`0.25x=100\\x=100/0.25\\x=400`

Hope this helps!

So you are solving for circumference of a quarter circle:
`(1)/(4)2 \pi r`

r= 28

`\pi=3.14`

`(1)/(4)2(87.92)=\\43.96`