Solve the Problem $\int _ { 0 } ^ { \pi } 4 \cos x d x$

Multiple Choice

Solve the problem.
-Estimate the minimum number of subintervals needed to approximate the integral $\int _ { 0 } ^ { \pi } 4 \cos x d x$ with an error of magnitude less than $10 ^ { - 4 }$ using Simpson's Rule.

A) 19
B) 18
C) 20
D) 16