Question

Jamal is studying the temperature changes in water as he moves it from the freezer to a Bunsen burner. He finds that the temperature changes happen to behave in a sinusoidal manner. So, he develops a model to determine when the temperature will be at a peak and when it will be at a valley. He finds that at t = 4 minutes, the temperature reaches a maximum of 26° above freezing, and at t = 30 minutes, the temperature reaches a minimum of 10° below freezing. Which equation BEST models this situation?
A) y = 18cos(1/26(x - 4)) + 8
B) y = 8cos(1/26<(x - 4)) + 18
C) y = 18cos(pi/26(x - 4)) + 8
D) y = 8cos(pi/26(x - 4)) + 18

Answer 1

The correct answer is c)y=18cos(pi/26(x-4))+8