What percent was a television set reduced if it was marked $225 and sold for $195?

It costs 4.25 for 1 pound of roast beef. how much will it cost to purchase 2.5 pounds of roast beef? round to nearest cent

Perry observes the opposite parallel walls of a room in how many lines do the plains containing the walls intersect

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.