You estimate you can do 12 math problems in 45 minutes. how long should it take you to do 20 math problems?

Iam so stuck. what is the worked out answer for this question?

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.

For the equations below which statement is true ? -2x=14 6x=-42