In October 2005, a company employs 8000 people and its total monthly wage bill is 9.6 million dollars.

What is the average monthly wage of the company's employees?

• Average monthly wage :dollars.???

The company is growing at a rate of 15 employees per month.

The total monthly wage bill is increasing at a rate of 380 thousand dollars per month.

At what rate is the average monthly wage changing at this time?

Give your answer correct to the nearest cent per month.

• Rate of change:dollars per month.

You should be careful over the units in this question.

Hint: write the total monthly wage bill as the function f (t) and the number of employees as the function g (t). What is the average monthly wage in terms of the functions f and g?