Io The first term of a geometric progression is 9 and the fourth term is 45. The eighth term is?
Select one:
a. 657.9
ut of
O b. 384.7
O c. 150.5
O d. 225

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15

i think it is 24,000 or 460