After its second bounce, a ball reached a height of 80 cm. The rebound factor for the ball was 0.7. From approximately what height, in cm, was the ball dropped?

The table shows the number of employees and number of active customer accounts for some different marketing companies.

Would a linear or exponential model for the relationship between number of employees and number of customers be more appropriate? Explain how you know.

A bank account has a balance of 1,000 dollars. It grows by a factor of \(1.04\) each year.

1. Explain why the balance, in dollars, is a function, \(f\), of the number of years, \(t\), since the account was opened.
2. Write an equation defining \(f\).

This graph shows the cost in dollars of mailing a letter from the United States to Canada in 2018 as a function of weight in ounces.

1. How much does it cost to send a letter that weighs 1.5 oz?
2. How much does it cost to send a letter that weighs 2 oz?
3. What is the range of this function?

Piece wise function. Horizontal axis, weight in ounces. Vertical axis, cost in dollars. solid circle at 0 comma 1 point 1,5 horizontally to closed circle at 2 comma 1 point 1,5. open circle at 2 comma 1 point 6,1 horizontally to closed circle at 3 comma 1 point 6,1. open circle at 3 comma 2 point 0,8 horizontally to closed circle at 5 comma 2 point 0,8.