78 is the geometric mean of 30 and what number

202.8

Step-by-step explanation:

The geometric mean of 2 numbers a and b is

Here a = 30 and mean = 78, thus

= 78

To clear the radical square both sides

( )² = 78², that is

30b = 6084 ( divide both sides by 30 )

b = = 202.8

f is the midpoint of

step-by-step explanation:

i believe its "c" because all of the other options include a but it could be d because there is a way of financing with cash at certain places but its uncommon.