Ihave a 78.5% in my history class i have an exam of 52 questions how many questions do i need to get correct to keep a c average or higher?

Acolony contains 1500 bacteria. the population increases at a rate of 115% each hour. if x represents the number of hours elapsed, which function represents the scenario? f(x) = 1500(1.15)" f(x) = 1500(115) f(x) = 1500(2.15) f(x) = 1500(215)