Scale Copies
The length of a rectangle is 8 inches. Using a scale factor of 3, what would the new length of the rectangle be?
24 inches
The radius of a circle is 3. What is its area?
A = 28.27
How do we find the constant of proportionality?
ending/starting OR y/x
A t-shirt was originally $32. It was on sale for 25% off. What is the sale price of the t-shirt?
$24
Solve for x:
13x = 52
x = 4
Triangle A has a height of 10.
Triangle B has height of 15.
What is the scale factor from A to B?
1.5
The diameter of a circle is 10. What is its circumference?
C = 31.42
430 trucks
Your bill at a restaurant was $42.50. You want to leave a 16% tip for your waiter. What is your new TOTAL bill?
$49.30
Solve for y:
8y + 14 = 70
y = 7
A football field is 120 yards long. If want to draw it on paper, you want the scale to be 12 yards = 1 inch. What is the length of the drawing of the football field?
10 inches
The diameter of a circle is 14. What is its area?
A = 153.94
A 30 gallon water tank is draining at a rate of 3 gallons per minute. How many minutes will it take for the tank to drain completely?
10 minutes
A car salesman earns 10% commission from each car he sells. Today he sold a car for $18,500. How much commission did he earn?
$1,850
Solve for x:
18 = 3(x - 2)
x = 8
The length of one concrete block is 10 inches. On a scale drawing, each block is represented by 1 inch. What is the scale factor being used?
0.1
The radius of a circle is 17. What is its circumference?
C = 106.81
A car wash charges $2.00 for each minute of use. If it takes you 15 minutes to wash your car, how much do you have to pay?
$30
The sales tax on your groceries is 9%. Your bill before taxes was $106. What is your TOTAL bill after sales tax is added?
$115.54
Solve for y:
12y - 15 = 129
y = 12
If the scale factor is 5, what is the area being multiplied by?
25
The circumference of a circle is 87.92. What is its diameter? (round to the nearest whole number)
d = 28
You start a dog-walking business and charge $15 for 2 dogs, $20 for 3 dogs, and $25 for 4 dogs. Is this a proportional relationship? EXPLAIN your answer.
no
15/2 = $7.50 per dog
20/3 = $6.67 per dog
25/4 = $6.25 per dog
The sale price of a basketball is $525 after it was 25% off. What is the ORIGINAL price of the basketball goal?
$700
Solve for x:
16(x - 5) = 448
x = 33