The surface area of a plastic ball is 196 pi. a sponge ball has a radius twice that of the plastic ball. what is the surface area of the sponge ball?

this is the formula: v = the value of investment at the end of the time period

p = the principal amount (the initial amount invested)

r = the annual interest rate

n = the annual frequency of compounding (how many times a year interest is added)

t = the number of years the money is invested

^ means raise to the power of

the easiest way to do these would be to solve the equations. if you can solve the equation than you can solve these problems.