Please help I’ll mark brainliest

A is the correct answer

Hope this helps :)

Step-by-step explanation:

This is because you have to substitute numbers.

So,

f(x) = 4 * 2^x

f(1) = 4 * 2^1 = 8

f(2) = 4 * 2^2 = 16

f(3) = 4 * 2^3 = 32

This shows exponential growth. Hope this helped!

Hope this helps,

Kavitha

the answer is a

step-by-step explanation:

because if you put 1 in to the square root of x it equals 300.

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice