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If 30(px2+16)dx = 129. Find the value of p...

If 30(px2+16)dx = 129. Find the value of p

A.

9

B.

8

C.

7

D.

6

Correct answer is A

30(px2+16) = 129

px2+10+1+16x|30=129

px33+16x|30=129

(p(3)33+16(3)) - 0 = 129

9p + 48 = 129

9p = 129 - 48 

9p9=819 

p = 9