Ticket out the Door


1. Compare r/100 in the percent proportion and r in the simple interest formula. How are they the same? How are they different?

 

2.Explain how to find 57% of 42 using a scientific calculator.

 

3.Explain why an investor might invest a greater amount of money in a lower rate of interest instead of a higher rate.

 

4.Read the following excerpt from an article about the America's Cup yacht race in a magazine. Explain what is incorrect in this exerpt and why.

With a Ph.D. from MIT, (Dr. Koch) takes a scientific view of things, and quantifies the effort involved in winning the Cup as 55 percent boat speed, 20 percent tactics, 20 percent crew work, 5 percent luck, and less than 5 percent physical strength.

 

5.Draw a circle graph to represent the number of students in your school by grade level.

 

Write each ratio as a percent and then as a decimal.

6. 3/4

 

7. 2/25

 

Use a proportion to answer each question.

8. Eleven is what percent of 20?

 

9. What percent of 80 is 45?

 

10.Finance Kaylee Richardson invested $7200 for one year, part at 10% annual interest and the rest at 14% annual interest. Her total interest for the year was $960. Hwo much money did she invest at each rate?

 

 


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