"best buy"
Scale Factor
Percent
Geometry
Constant of Proportionality
100

Which is the 'best buy' for a box of cereal?

Option A: 12oz for $3.00

Option B: 18oz for $4.32

Option C: 24oz for $6.00

Option D: 30oz for $7.50

Option B

100

A blueprint uses a scale where 0.5 inches = 12 feet. If a hallway is 1.25 inches long on the blueprint, what is its actual length in feet?

30 feet

100

You leave a 20% tip on a restaurant bill. If the total amount paid (including the tip) was $45.60, what was the price of the meal before the tip?

$38.00

100

A triangular prism has a base that is a right triangle with legs of 6 cm and 8 cm. The height of the prism is 12 cm. What is the volume?

288 cubic centimeters

100

A table shows that 2 pounds of apples cost $5.00 and 5 pounds cost $12.50. What is the constant of proportionality (k) for the cost per pound?

k=$2.50

200

A 1.5 gallon container of juice costs $6.00. A 64 ounce bottle of the same juice costs $2.40. Given that 1gallon = 128 ounces, which is the better buy?

The 1.5 gallon container

200

A rectangle on a map has an area of 6 square inches. The scale is 1 inch = 5 miles. What is the actual area in square miles?

150 square miles

200

A store buys a video game for $40 and marks it up by 30%. Later, a customer buys the game and pays an 8% sales tax on the marked-up price. What is the total final cost?

$56.16

200

A circular rug has a diameter of 10 feet.  What is the area of the rug?

Use 3.14 for pi

A=pi(d)

78.5 square feet

200

On a graph, the x-axis represents 'Time in Hours' and the y-axis represents 'Total Pay'. If the graph is a straight line through the origin and passes through (5, 75), what does the point (1, 15) represent?

$15 per hour

300

Cub foods sells 5 lbs of flour for $4.50. Wal-Mart sells flour for $0.10 per ounce. Which store is cheaper, and by how much per pound? (Note: 1 lb = 16 oz)

Cub is cheaper by $0.70 per pound

300

An architect creates a model of a skyscraper using a scale of 1:500. If the model is 8 meters tall, how tall is the actual building in meters?

400 meters

300

You invest $1,500 in a savings account with a 4% simple interest rate. How much interest will you earn after 6 years?

(use the formula I = Prt)

$360

300

A cylindrical container has a radius of 3 inches and a height of 10 inches. What is the volume of the cylinder? (Use 3.14 for pi)

282.6 cubic inches

300

Which of the following tables represents a proportional relationship?

A. x:2,4,6  y:5,10,15

B. x:1,2,4  y:4,5,6

C. x:2,3,4  y:4,9,16

D. x:0,1,2  y:2,4,6

Table A

400

A 32 oz bottle of detergent costs $4.80. A 50 oz bottle is on sale for 20% off its original price of $9.00. Which is the better buy?

The 50oz bottle.
400

A photo that is 4 inches wide by 6 inches tall is enlarged so that the new height is 15 inches. What is the new width?

10 inches

400

A bike is on sale for 25% off its original price of $240. After the discount is applied, an 8% sales tax is added. What is the final amount paid?

$194.40

400

A rectangular prism has a length of 8 cm, a width of 5 cm, and a height of 10 cm. What is its surface area?

340 Square Centimeters

400

A water tank leaks at a constant rate. After 3 hours, it has leaked 12.6 gallons. Which equation represents the total gallons leaked (g) after h hours?

A: g=0.23h

B: g=h/4.2

C: g=4.2h

D: g=3h+12.6

C: g=4.2h

500

A map has a scale of 1 inch : 20 miles. A lake on the map is represented by a circle with a radius of 0.25 inches. What is the actual area of the lake in square miles? (Use 3.14 for pi)

78.5 miles

500

A car uses 12.5 gallons of gas to travel 350 miles. How many gallons will it need for a 560 mile trip at the same rate?

20 gallons

500

You take out a loan for $5,000 to buy a car. The simple interest rate is 6%. If you pay off the loan in 4 years, what is the total amount you will have paid back?

(use the formula I = Prt)

$6,200

500

A composite figure is made of a rectangle (8m by 5m) and a triangle with a base of 8m and a height of 3m attached to the top. What is the total area?

52 square meters

500

A graph of a proportional relationship passes through the point (4, 10). What is the equation for this relationship?

A. y=2.5x

B. y=4x+10

C. y=0.4x

D. y=x+6

A. y=2.5x