Michael's dog ate 6 cans of dog food this week. Each can contained 48.6 grams of protein. How much protein was this in all?

$465

Step-by-step explanation:

Given expression: , where  h is the number of hours worked and f is the number of fixtures installed.

To find total charges (in dollars) when he works 7 hours and installs 9 fixtures, substitute h=7 and f=9 in the given expression, we get

Therefore, Ben Frank charges $465 when he works 7 hours and installs 9 fixtures.