Percent of Increase/Decrease, Percent of Error, Simple Interest

The original quantity is 18 and the new quantity is 35, is this a percent increase or decrease and estimate the percent change. YOU WILL CHOOSE 2 OPTIONS

• increase

• decrease

• 100%

• 75%

• 50%

The original quantity is 50 and the new quantity is 85. What is the percent increase? DO NOT TYPE THE PERCENT SIGN.

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

You invest $2,500 in each of two accounts. Account A earns simple interest rate of 3% over 2 years and Account B earns simple interest at a rate of 6% over 15 months. Find the interest earned in each account. YOU WILL CHOOSE MORE THAN ONE ANSWER.

• Account A = $1,500

• Account A = $150

• Account B = $187.50

• Account B = $1,875

• Account B = $2250

Edward deposited $4,000 into a savings account 4 years ago. The simple interest rate is 2%. How much money did Edward earn in interest? What is his new account balance? YOU WILL CHOOSE 2 ANSWERS.

• $320

• $3,200

• $3,680

• $4,320

• 1,280,000

Suppose you deposit $700 in a bank with a simple interest rate of 3.4%. You want to keep your deposit in the bank long enough to earn at least $150 in interest. How long should you keep your deposit in the bank? ROUND UP TO THE NEXT FULL YEAR. ONLY TYPE THE NUMBER.

Find the balance of an account after 5 years that you deposited $4,400 with an interest rate of 8%. DO NOT TYPE A DOLLAR SIGN OR ANY COMMAS OR SPACES.

You deposit $600 into a savings account that earns simple interest. After 5 years your balance is $720. Find the interest rate.

HINT: FIND THE AMOUNT OF INTEREST YOU HAVE FIRST

ONLY TYPE THE NUMBER, NOT THE PERCENT SIGN

To find simple​ interest, you multiply the principal​ (in dollars), the interest rate​ (as a​ decimal), and the time in years. The equation 6.40=200•0.016•2 shows how to find the simple interest for a certain account after 2 years. What is the interest rate​ (as a​ percent)?

• 6.40%

• 200%

• 0.016%

• 1.6%

• 2%

To find simple​ interest, you multiply the principal​ (in dollars), the interest rate​ (as a​ decimal), and the time in years. The equation 6.40=200•0.016•2 shows how to find the simple interest for a certain account after 2 years. What is the principal?

• $6.40

• $200

• $1.60

• $0.016

• $2