16 1/2 ÷ 6.49 as a unit rate and then explain my answer.

Factor the polynomial expression x6 – x3 – 20

At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?

Consider a= {x|x is alive} f={x|x is in france} m={x|x is a national monument} w{x|x is a woman}. which statements are true regarding elements of the given sets? check all that apply.