Question

calculate the geometric mean of 8 and 98.
21
40
23
28
none of these answers are correct.

Explanation:

Step1: Recall the formula for geometric mean

The geometric mean of two numbers \(a\) and \(b\) is \(\sqrt{ab}\). Here \(a = 8\) and \(b=98\).

Step2: Calculate the product \(ab\)

\(ab=8\times98 = 784\)

Step3: Find the square - root of the product

\(\sqrt{784}=\sqrt{28\times28}=28\)

Answer:

D. 28