Percent Error, Percent of Change, Simple Interest

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

• 25%

• 50%

• 75%

• 100%

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?

• 35%

• 75%

• 85%

• 92%

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

• 4%

• 20%

• 3.8%

• 15.2%

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?

• $150

• $192

• $1,350

• $1,392

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?

• 5%

• 7%

• 8%

• 9%

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

• $120

• $144

• $1,200

• $1,440

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.

• $720

• $20,960

• $1,080

• $12,960

Find the percent error:

Estimated Value: 43

Actual Value: 50

DO NOT TYPE THE PERCENT SIGN

Find the percent errors for Trial A and Trial B.

• Trial A = 10%

• Trial A = 9%

• Trial B = 33%

• Trial B = 50%

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

• r = 3.1%

• P = 3

• I = $55.80

• T = 600