Given a spherical weather balloon with a volume of 36π cubic feet. what is the diameter, in feet, of the weather balloon?
a) 3
b) 6
c) 9
d) 12

option B

Step-by-step explanation:

we know that

The volume of the sphere is equal to

In this problem we have

substitute and solve for r

simplify

Find the diameter

215.92 dollars is the answer

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