Answer:
It would not change
Step-by-step explanation:
Because if you add you get the same thing
Answer:

Step-by-step explanation:
The formula of a surface area of a ball (sphere):

R - radius
We have R = 15in. Substitute:

If you want to get an approximation, then:

Answer: (6^-4)^-4 , (6^-2)^-8, (6^8)^2
Step-by-step explanation:
When there is a number with an exponent in a parenthesis raised to another exponent, you multiply the two exponents together. So, in this case we are looking for 2 exponents that give us a product of 16.