It will take 80 minutes to fill the pool 20x4=80
The answer to the question is b
The GCF is 1 and the LCM is 1260
It won't be 0 because f(0) = 300
AS the last term is 300 the zeroes could possibly be 4 of the following possibilities +/-1 , +/-3 , +/- 10 ( The Rational Roots Theorem)
f(3) = 3^4 - 2(3)^3 - 103(3)^2 + 209(3) + 300 = 0
so 3 is one zero
f(10), f(-10) and f(-1) are also = zero
so the list is -10, -1, 3, 10 answer
