Help me Guess just help please

Diane owes $387 to her brother. if she debits her bank account $161.25 a month to pay him back, how many months will it take her to pay off the debt?

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

If you double the input of a function and it results in half the output, and if you triple the input and it results in a third of the output, what can be guessed about the function? check all that apply.