To find the radius r of a sphere of volume V, use the equation r = ∛(3V)/(4π). a. Graph the equation. b. A balloon used for advertising special events has a volume of 225 ft³. What is the radius of the balloon?

b.an increase in a causes b to decrease

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt