Carlos buys a new phone. He makes an initial payment of
$39.50. In order to pay off the
balance on this phone, he has
to make nine additional
payments of $29.30 each.
What is the total cost of the
phone?

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.

abby has a greater debt becasue she owea 5 more then alan does