Help me plz 100% and ill give a a Brainlist

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*

The mass of a marine organism, in pounds, p years after it is born is given by the polynomial function r(p) = -4p2 + 300p. find the mass when p = 20 years.

5of the first 50 shoppers at a grocery store buy apples. how many shoppers can the store manager expect to check out before 25 customers buy applesa.) 100b.)150c.)200d.)250