Toni has a 10-inch-high model of a tree that is actually 20 feet tall. She is making a model of a man who is
6 feet tall to put under the tree. What is the scale of the
tree model? How tall should the model of the man be?

Below in bold.

Step-by-step explanation:

The scale of the tree model is 1 inch equals 20/10 = 2 feet.

So the scale is 2 feet to 1 inch.

So the model of the man will be  6/2 = 3 inches tall.

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