Is this a polygon or not a polygon

This is not a polygon as it has a section (at the bottom) which is composed of non-straight segments.

No it is not since there are more than 5 sides.

Step-by-step explanation:

boxplot e is the answer

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