Baby anna wants to arrange 12 blocks in a row. how many different arrangements can she make

Me figure out the process to determine x you appreciate it : )

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.

Is a positive integer raised to a negative power always positive