Answer asap but wait until i post the question

The diameter of a circular chip is doubled to use in a new board game. the area of the new chip will be

Write the following as a base and exponent

In the next 10 month,colin wants to save $900 for his vacation.he plans to save $75 each of the first 8 months. how much must he save each of the last 2 months in order to meet his goal if he saves the same amount each month ?