What is the factored form of the expression?

s^4 – 16

a. (s - 2)^2(s + 2)^2

b. (s - 2)(s + 2)

c. (s - i)(s + i)(s - 2)(s + 2)

d. (s - 2i)(s + 2i)(s - 2)(s + 2)

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.

What is the value of x in the equation7x+2y=48 when y=3

Eden has a part time job. she is paid ? 7.20 an hour the week she worked 18 and a half hours how much is she paid