Ms. Trowbridge will receive a 40% discount off her first cell phone bill. Her monthly cell phone plan charges a flat monthly fee of $25.00 plus $0.20 per minute. If Ms. Trowbridge talks on her cell phone for 300 minutes during the first month of cell phone service, what will be the amount of her first cell phone bill?

A) $34.00

B) $36.00

C) $45.00

D) $51.00

Answer: $51.00

Step-by-step explanation:

Since $0.20 is charged per minutes, that is, the amount charged for 300 minutes will be:

300 x 0.20 = $60

Her monthly cell phone plan charges a flat monthly fee of $25.00, that is the total amount charged will be

$60 + $25

= $85

There is a 40% discount, then we have

40% of $85

= $34

So, the amount of her first cell phone bill = $85 - $34

= $51.00