A new drill is used to dig a hole in the ground. At noon, the hole is 13.2 feet deep when the new drill is turned on for the first time that day. At 2 p. m., the drill has dug the hole to be feet deep. The new drill dug 1.5 times as much of the hole as the old drill would have in the same length of time. What expression represents the number of feet the new drill dug?
How many feet would the old drill have dug in the same length of time? Show your work. Answer the question in a complete sentence.

Evaluate the expression . Write your answer as a simplified mixed number, or as a decimal. Show your work.
Consider this sum of two linear expressions.

What are the like terms in the two linear expressions?
What is the sum of the linear expressions? Express your answer in simplest form. Show your work.