Question

What is the geometric mean of 3 and 15?

Answer 1

Do you remember the definition of the geometric mean?

Answer 2

nope :/

Answer 3

it's like a median

Answer 4

For "n" numbers, it's the n-th root of the numbers' products. For two numbers, it's the square root of the numbers' products.

Answer 5

So multiply the numbers and take the square root. What do you get?

Answer 6

6.7

Answer 7

that's what I got

Answer 8

but the choices are

A) 22.5
B) 45
C) 3 Square root 5
D) 5 Square root 3

Answer 9

OK, well, that means you have to simplify sqrt(45). Do you know how to reduce a radial to simplest form?

Answer 10

so the answer is "C"?

Answer 11

yep

Answer 12

thanks (: