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.

Step-by-step explanation:

Given

Required

Determine the scale

This is calculated as:

Factorize the numerator

Scale = \frac{1.5 * (3,2)}{(3,2)}