Abox contains eight cards labeled p, q,r, s,t, u,v, and w. one card will be randomly chosen.
what is the probability, of choosing a letter from p to r?
write your answer as a fraction in simplest form.

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

I’m on question 7 it says a covered water tank is in the shape of a cylinder the tank has a 28 inch diameter and a height of 66 inches to the nearest square inch what is the surface area of the water tank

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?