At which values of x does the function F(x) have a vertical asymptote? Check all that apply

F(x) = 1/(x - 4)(x + 1)

a 0
b -1
c 2
d 1
e 4
f -4

Sally deposited money into a savings account paying 4% simple interest per year. the first year, she earned $75 in interest. how much interest will she earn during the following year? show your work and explain your reasoning in the space provided below.