Brian billed his neighbor a total of $81.80 for the landscaping work he did. The cost of the materials was $30 and he charged $14 per hour for his service. How many hours did he work?

Question

A) 10.4 hours
B) 7.5 hours
C) 5.6 hours
D) 3.7 hours

Answer 1

B) 7.5 hours

To calculate the number of hours Brian worked, we first subtract the cost of materials from the total amount billed:
$81.80 - $30 = $51.80

Then, we divide the remaining amount by the rate Brian charged per hour:
$51.80 / $14 = 3.7 hours

Therefore, Brian worked for 7.5 hours.