Multiply your total by your percentage
90 * .80 = 72
72 is the number of questions she answered correctly
The simple interest on the principal amount of $725 at a rate of 3.25% for 6 months is $736.78
<h3>What is simple interest? </h3>
Simple interest is calculated on the loan principal amount or the initial deposit into a savings account. It can be determined by using the formula:

where:
- P = principal = $725
- R = rate = 3.25%
- T = time = 6 months = 0.5 years

S.I = $736.78
Learn more about simple interest here:
brainly.com/question/2294792
Answer:
(C).
Step-by-step explanation:
=
8 cubed, 8^3, is the number you get when multiplying 8 times 8 times 8. It can also be looked at as exponentiation involving the base 8 and the exponent 3.
8^3 = 512
8 x 8 x 8 = 512