Question

Determine the geometric mean of 8 and 12, to the nearest tenth.
A) 10.0
B) 4.5
C) 48.0
D) 9.8

Answer 1

Answer:

D) 9.8

Step-by-step explanation:

The geometric mean of two numbers x and y is

$\sqrt{xy}$

so $\sqrt{8*12}$ = $\sqrt{96}$ $\approx 9.7979$

Which, since the 9 in the hundredths place is greater than 5, we can round up to 9.8