1. $57.80 The bill is about $58. So, a 20% tip would be $58 divided by 5, which is $11.60.

Transcription

1 End of Chapter Test Name Date Estimate a 20% tip for each of the bills shown. 1. $57.80 The bill is about $58. So, a 20% tip would be $58 divided by 5, which is $ $ The bill is about $122. So, a 20% tip would be $122 divided by 5, which is $ Estimate a 15% tip for each of the bills shown. 3. $57.80 I first rounded the bill to $58. Next, I divided $58 by 10, which is $5.80. Then, I divided this amount in half, which is $2.90. Finally I added these two amounts together to calculate a reasonable 15% tip of $ $ I first rounded the bill to $122. Next, I divided $122 by 10, which is $ Then, I divided this amount in half, which is $6.10. Finally I added these two amounts together to calculate a reasonable 15% tip of $ A printer is normally $ but is discounted to $ What percent of the original price does Hank pay? Percent part 5 of quantity Part Pecent whole Whole quantity x x x 75% Hank would pay about 75% of the original price. Chapter 3 Assessments 1063

2 End of Chapter Test page 2 6. Anthony got 4 problems wrong on a test of 50 questions. What percent of the questions did he get correct? Percent part Pecent whole 5 Part of quantity Whole quantity x part Percent 5 Part of quantity Pecent whole Whole quantity 50x or x x x % 2 8% 5 92% x 5 92% Anthony got 92% of the questions correct. 7. Scott s monthly income is $3500. Scott spends 12% of his monthly income on groceries. a. Calculate the amount Scott spends each month on groceries. Use a Proportion g (3500) 5 g g; g Use a Percent Equation (3500) 5 g 0.12(3500) 5 g g; g Scott spends $420 on groceries each month Chapter 3 Assessments

3 End of Chapter Test page 3 Name Date b. Scott spends $250 each month on his car. What percent of his monthly income does Scott spend on his monthly car payment? Use a Proportion c (100) (250) c c 7 Use a Percent Equation c(3500) c c < 0.07 Scott spends about 7% of his monthly income on his car payment. 8. Complete the table to show the interest earned for different savings principals, interest rates, and time periods. Principal Amount Saved (in dollars) Interest Rate Time (in years) Interest Earned (in dollars) 175 2% % % % Chapter 3 Assessments 1065

4 End of Chapter Test page 4 9. E-tronics Galore marks up their prices to maximize profits. Complete the table to show the percent increase of each item. Round to the nearest whole percent, if necessary. Item Cost Sells For Difference % Increase Computer $540 $680 $140 26% Digital Camera $188 $247 $59 31% MP3 Player $235 $289 $54 23% Mouse and Keyboard $53 $99 $46 87% 10. A computer depreciates about 20% each year. How much would a new computer depreciate the first year if it cost $540? It would depreciate (0.20)(540) 5 $108. A computer that costs $540 would depreciate $108 in the first year. 11. Products at an electronics store cost less if purchased online than in the store. The chart shows the in-store price and the online price. In-Store Price Online Price $50 $45 $75 $67.50 $100 $90 a. Does the online price vary directly with the in-store price? Explain your reasoning. The prices vary directly. The ratio of the online price to the in-store price is always 0.9, or 90%. Therefore, the ratios are equivalent and the two prices are directly proportional Chapter 3 Assessments

5 End of Chapter Test page 5 Name Date b. Define the variables and write an equation to represent the relationship between the in-store price and the online price. Let l represent the online price and let s represent the in-store price. l 5 0.9s c. What is the constant of proportionality? Interpret the constant of proportionality for this problem situation. The constant of proportionality is k The 0.9 means that the online price is 90% of the in-store price. d. What is the online price for a product that costs $92 in the store? l 5 0.9s l 5 0.9(92) l 5 $82.80 A product that costs $92 in the store would cost $82.80 online. 12. A realtor makes 5% commission on each sale. a. Define the variables and write the equation that represents the relationship between the price of a home and the commission received. Let p represent the cost of a home and let c represent the commission the realtor earns from a sale. c p b. How much commission will the realtor earn for selling a $150,000 home? c p c (150,000) c The commission would be $7500. Chapter 3 Assessments 1067

6 End of Chapter Test page 6 c. If the realtor earned a $8750 commission, what was the price of the home? c p p p p 5 $175,000 The price of the home would be $175, Chapter 3 Assessments