Dhoni rented a power tool from a rental shop. The rent for the tool was $10 for the first hour and $4 for each additional hour. If Dhoni paid a total of $38, excluding sales tax, to rent the tool, for how many hours did she rent it?	Choose the correct answer:
A) 6 B) 10 C) 12 D) 13 E) 8
10 + 4n = 38   n = 7   Total time = n+1 hrs = 7+1= 
<gadget id="calculator">7+1</gadget>
<output>8</output>
8 hrs   Answer : 8
<result>E</result>
Dhoni rented a power tool from a rental shop. The rent for the tool was $10 for the first hour and $4 for each additional hour. If Dhoni paid a total of $38, excluding sales tax, to rent the tool, for how many hours did she rent it?