Consider the question. Find the mean proportional between 81 & 100?
Options:
(A) A) 59
(B) B) 61
(C) C) 63
(D) D) 65
(E) E) 90
What is the step-by-step reasoning process to arrive at the answer: (E)?
Formula = ab
A = 81 and B = 100
81100 = 9 10 = 90