Use the rational zeroes theorem to factor the function f(x) = x3 – 21x + 20 completely. (A) (x - 1)(x + 4)(x + 5)
(B) (x + 1)(x - 4)(x + 5)
(C) (x - 1)(x – 4)(x - 5)
(D) (x - 1)(x – 4)(x + 5)
(E) (x + 1)(x - 4)(x - 5)

The high temp today was 62°. when nighttime comes, the temp will drop 40°. by 4am the temp will drop an additional 40°. what is the temp at 4am?

Which of these side lengths could form a triangle a) 2 cm , 2 cm , 4 cm b) 3 cm , 5 cm , 10 cm c) 3 cm , 4 cm , 5 cm d) 4 cm , 8 cm , 15 cm

Captain umaima has a ship, the h. m.s. khan. the ship is two furlongs from the dread pirate nadia and her merciless band of thieves. the captain has probability 3/7 of hitting the pirate ship. the pirate only has one good eye, so she hits the captain's ship with probability 2/5. if both fire their cannons at the same time, what is the probability that the captain hits the pirate ship, but the pirate misses.