What is (10^9)^3 written as a single exponent

What is the exact volume of the cylinder (radius 13 in., height 30 in.)

The amount of money, in dollars, in an account after t years is given by a = 1000(1.03)^t. the initial deposit into the account was $_^a0 and the interest rate was _a1% per year. only enter numbers in the boxes. do not include any commas or decimal points^t. the initial deposit into the account was $__^a0 and the interest rate is % per year.

Write the rational number in lowest terms 99/-15