Percent Error, Percent of Change, Simple Interest

What is the percent change when a quantity increases from 100 to 150?

Zed went to the store and bought a bag of chips.  He estimated there would be 350 chips in the package, but realized there were only 200 chips in that package.  What was his percent error?

An archaeologist estimated that a fossil was 520 years old. It was actually 500 years old. What was the percent error?

Emilio borrows $1,200 from a bank with 8% simple interest per year.  How much will he have to pay back total in 2 years?

Jenna borrowed $5,000 for 3 years and had to pay $1,350 simple interest at the end of that time. What rate of interest did she pay?

Dan borrowed $2,000 for 6 months at 12% annual simple interest rate. How much interest is that?

When Lila was born, her parents put $8,000 into a savings account that earned 9% simple interest. Find the amount of interest earned after 18 years.

Find the percent error:

Estimated Value: 43

Actual Value: 50

DO NOT TYPE THE PERCENT SIGN

(a)  

Find the percent errors for Trial A and Trial B.

Suppose you deposited $600 in a savings account 3 years ago. The simple interest rate is 3.1%. The interest that you earned in those 3 years is $55.80. Which of the following is/are true? YOU MAY CHOOSE MORE THAN ONE ANSWER