The volume of air inside a rubber ball with radius r can be found using the function v(r)=4/3 πr3 . what does v[5/7] represent? a. the radius of the rubber ball when the volome equals 5/7 cubic feet b. the volome of the rubber ball when the radius equals 5/7 feet c. that the volume of the rubber ball is 5 cubic feet when the radius is 7 feet d. that the volume of the rubber ball is 7 cubic feet when the radius is 5 feet

we know that

The volume of a sphere (rubber ball) is equal to

where

r is the radius of the sphere (rubber ball)

The volume in function notation is equal to

in this problem we have

that means

The radius of the rubber ball is

and

The volume of the rubber ball is

therefore

the answer is the option B

the volume of the rubber ball when the radius equals feet

for the points

step-by-step explanation:

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x