The volume of air in a balloon is represented by the function V (r) = four-thirds pi r cubed, where r is the radius of the balloon, in inches. The radius of the balloon increases with time, in seconds, by the function r (t) = one-fourth t squared. Write a composite function that can be used to determine the volume of the balloon after t seconds. Then, select the two true statements.

You do not need calculus for this problem, as it is currently stated.  Is something missing from the problem statement?  If not, then just find the difference between the volumes.  That will be the additional air required to inflate from the lower volume to the higher volume.  For r in inches and V(r) in inches cubed,

V1(r) = (4/3)πr3

V2(2) = (4/3)π(r + 1)3

V2(r) - V1(r) = (4/3)π[(r + 1)3 - r3]

That is your function.  You can simplify it further if you wish.

brainliest answer plz

hope this helps BTW

The answers are A and C

Step-by-step explanation:

Just did it on e2020

hey there!

if she's saving for six months, let's divide the total number we need for the trip by six, dividing it into the amount that needs to be saved for each month.

500 ÷ 6 =

she needs to save at least this amount each month, so we should use this symbol: ≥

let x be the amount she saves each month.

your final answer is x ≥

hope this !