Helen borrowed
$8,000
from her grandfather to pay for college. five years later, she paid him back the
$8,000
and an interest of
$1,200
. what was the annual interest rate?

%2.83467

Step-by-step explanation:

first you use the equation A = P(1+r)^T

Where A is the future value (in your case $9200)

P is the amount ($8000)

r is interest rate (what you are trying to figure out)

and T is the time (5 years)

so you would substitute in your numbers and solve for r

3< x< 5

step-by-step explanation:

|x - 4| < 1

there are two solutions, one positive and one negative.   remember to flip the inequality when taking the negative solution

x-4 < 1       x-4 > -1

add 4 to each side

x-4+4 < 1+4       x-4+4 > -1+4

x< 5                 x> 3

3< x< 5