Find the amount Erica owes at the end of 3 years if ​$6400 is loaned to her at a rate of 7% compounded monthly.

$7840

Step-by-step explanation:

Given data

P=6400

r=7%

t= 3 years

The compound interest expression is given as

A= P(1+r)^t

Substitute

A= 6400(1+0.07)^3

A= 6400(1.07)^3

A= 6400*1.225

A= $7840

Hence at the end of 3 years she owes $7840

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.