Ch 11 Review

Home heating oil is sold by the gallon. Last winter, the Ramos family used 428 gallons of oil at a price of $1.72 per gallon. If the price increases 5.15% next year, what will their approximate heating expense be?

• $774

• $702

• $688

• $795

Tags

CCSS.7.RP.A.3

Last spring, Riley was charged $919.76 for 7,962 kWh of electricity.

 

What did the electric company charge per kilowatt-hour of electricity?

• $.12

• $.14

• $.16

• $.18

Tags

CCSS.6.RP.A.3B

Last spring, Riley was charged $919.76 for 7,962 kWh of electricity.

This fall she was charged $1,327.64 for 9,000 kWh of electricity. What was the percent change per kilowatt-hour? Round to the nearest tenth of percent. ((hint: to do this accurately, round the two $/KwH calculations to the hundredth place (since they're in dollar terms) before doing the percent change formula))

• 25%

• 22%

• 18%

• 37%

Tags

CCSS.6.RP.A.3C

The Royal Water Company uses water meters that measure water usage in gallons. They charge $0.46 per CCF of water.

 

a.  Alana was charged $120 to turn on the water to her house, but she was able to divide that cost up over her first year of water bills. How much did she pay each month for this initial charge?

 

 

b. Alana’s first meter reading was 2,105 CCF and her next month meter reading was 2,411 CCF. What was the amount of her water bill, including the monthly amount she owed for turning on the service?

• a $10 b $150.76

• a $10 b $140.76

• a $20 b $160.76

• a $20 b $170.76

Tags

CCSS.7.EE.B.3

Hannah’s cell phone plan includes 4GB of data. On the 19th day of her billing period, Hannah received a message from her service provider that she had already used 82% of her data allowance for the 31-day billing period.

 

a.  How many GB of data did she use?

 

 

b. At this rate, will she use more than 4GB of data for the month?

• a 3.28 b Yes

• a 3.28 b No

• a 2.38 b Yes

• a 2.38 b No

Tags

CCSS.6.RP.A.3C

The cost to play a particular online game is $2.99 for the first 30 minutes and $0.12 for each additional minute or part of a minute.

 

 

 

How much will it cost to play the game for 5 hours?

• $35.39

• $32.98

• $31.91

• $28.79

Tags

CCSS.7.EE.B.3

Last year, Alex paid $125 per month for her cable TV/internet/phone services. In addition, her monthly cell phone bill averaged $90 per month. This year, these expenses are expected to increase 6.2% due to inflation. How much will she pay this year for the same services?

• $228.33

• $237.88

• $245.61

• $252.82

Tags

CCSS.6.RP.A.3C

Use the pie chart below of Winnie’s monthly budget. Suppose the amount budgeted for Mortgage is $3,000.

b.  What is Winnie’s total amount budgeted?

 

 

c.  What amount is budgeted for her savings?

 

• a $7,500 b $750

• a $750 b $75

• a $1,200 b $120

• a $600 b $300

a What is Melissa’s debt-to-income ratio? Express that ratio as a percent rounded to the nearest whole percent.

b A credit counseling service advises her that if her debt-to-income ratio is more than 35%, she should develop a debt reduction plan. Based on that advice, should she develop a debt reduction plan?

• a 43% b yes

• a 38% b yes

• a 38% b no

• a 43% b no

Tags

CCSS.6.RP.A.3C

Melissa’s total debt (student loan, car loan, credit card, and graduate school) is $120,000. She is considering consolidating this debt into a personal loan with an interest rate of 5.8% for 10 years. What would her monthly payment be if she chose consolidation?

• $1,410.32

• $1,120.11

• $1,320.26

• $1,239.95