Aspherical balloon with radius r inches has volume v(r) = 4 3 πr3. find an expression that represents the amount of air required to inflate the balloon from a radius of r inches to a radius of r + 2 inches. (express your answer in terms of π and r.)

ratio is 2 : 9

the answer is three

13.5 : 3

for this case we have that by definition, the surface area of a cylinder is given by:

where:

r: it is the radius of the cylinder

h: it is the height of the cylinder

we can also rewrite it as:

where:

la: it's the lateral area

ba: area of the base

option a