Solve the Problem $s ( t ) = - 5 \cos ( 6 \pi t )$

Multiple Choice

Solve the problem.
-The position of a weight attached to a spring is $s ( t ) = - 5 \cos ( 6 \pi t )$ inches after $t$ seconds. What is the maximum height that the weight rises above the equilibrium position?

A) $5 \mathrm { in }$ .
B) 6 in.
C) $\frac { 6 } { \pi } \mathrm { in }$ .
D) $\frac { 5 } { 6 } \mathrm { in }$ .