Select the correct answer. The variable svaries directly as the square of t. When s= 4, t= 12. Nick's work finding the value of t when s = 48 is shown:
s = kt^2
12 = k . 4^2
12 = 16
0.75 = k
48 = 0.75t^2
64 =t^2
8=t
What is the first error, if any, in Nick's work?