An electronics retailer used regression to find a simple model to predict sales growth in the first quarter of the new year (January through March). The model is good for 90 days, wherexis the day. The model can be written as follows:

= 101.32 + 2.48x

whereis in thousands of dollars.

What would you predict the sales to be on day 75? Give answer to 2 decimal places.

A landscaping company is hired to mow the grass for several large properties. The rate at which one person can mow is as follows:

= 1350 - 1.2x

wherexis the number of hours andrepresents the number of acres left to mow.

How many hours will it take to mow all of the lawns?