X^2 ≤ 25 how do you solve this?

Can someone show me the steps to solve the problem?

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

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.