Percent Error, Percent of Change, Simple Interest

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. How much is the simple interest?

• $6.40

• $1.60

• $0.016

• $200

• $2

Tags

CCSS.7.RP.A.3

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

Tags

CCSS.7.RP.A.3

An account has a principal of ​$100 and a simple interest rate of 3.8​%. The table shows the simple interest earned and the new account balance for​ 1, 2, and 3 years. Complete the table for the fourth year. YOU WILL CHOOSE 2 ANSWERS.

• $3.80

• $15.20

• $115.20

• $126.60

Tags

CCSS.7.RP.A.3

Find the principal if you earn $5.25 in interest after 21 months and the simple interest rate was 2.0%.

DO NOT TYPE A DOLLAR SIGN.

(a)  

Tags

CCSS.7.RP.A.3

Zach​'s savings account earns 2.5​% simple interest per year. The balance in his savings account at the beginning of the year is ​$1,200. If Zach makes no deposits or withdrawals for a whole​ year, which is closest to the balance he should have in his savings account at the end of the​ year?

• $3,000

• $30

• $1,450

• $1,230

Tags

CCSS.7.RP.A.3

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%

Tags

CCSS.6.RP.A.3C

You estimate that 200 people attend a school concert. The actual attendance was 240.   What is the percent error?

• 20%

• 18%

• 16%

• 17%

Tags

CCSS.6.RP.A.3C

You guessed that the Chicago Cubs would win 95 games during the regular season. They actually won 103. What was your percent error? Round to the nearest tenth if necessary.

• 7.8%

• 7.7%

• 0.77%

• 0.78%

Tags

CCSS.6.RP.A.3C

You guess that Lebron James would score 35 points during the game. He actually scored 28. Find your percent error.

• 30%

• 33%

• 75%

• 25%

Tags

CCSS.6.RP.A.3C

Ann works in a supermarket for $10.00 per hour. She received a raise to $12.00. What is the percent of change in her hourly wage?

• Increase 16.67%

• Decrease 16.67%

• Increase 20%

• Decrease 20%

Tags

CCSS.6.RP.A.3C