One serving of peanut butter contains 190 calories. What percent of a 2000 calorie diet is contained in one serving of peanut butter? a. 38%
b. 90.5%
c. 9.5%
d. 10.5%

C. 9.5% is the answer becuase 10 percent of 2000 is 200, so 190 is 9.5 percent of 2000.

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.