Um this makes no sense to me some plz help

How do you do the foil method with polynomials?

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.

Calculate the total payback for a $3,500 loan at 8% annual interest with monthly payments for two years. show all of your steps. use the formula, m = pm(1 + m)^na/(1 + m)^na - 1, as needed.