36 .
Figure 5In Figure 5, if the area of triangle ABC is 15, what is the length of AC?(A) 2.1
(B) 4.1
(C) 6.2
(D) 8.2
(E) 9.637 . Which of the following functions has a range of −1 < y < 1?
(A) y = sin x(B) y = cos x(C)(D)(E)
38 . What is the sum of the infinite series