Brainlist answer-which equation shows that you can find the power of a power by finding the product of the exponents?

Can anyone me with 32,33,36,37,and 40.

Julie buys 2kg of apples and 7kg of pears ? 12.70. the pears cost ? 1.30 per kilogram what is the price per kilogram of the apples? show your working out

Aweekly newspaper charges $72 for each inch in length and one column width. what is the cost of an ad that runs 2 column inches long and 2 columns wide? its not 288