Scales
5in = 50 miles.
What is the unit rate of this scale?
2 in. = 10 miles.
What is the unit rate?
1 in = 5 miles
What are the two things a graph must have to be proportional?
Straight line and starts at the origin
Diameter is 10 in.
What is the radius?
5 in
Radius is 20 in.
What is the diameter?
Diameter is 40 in.
The length of a patio is 14.7 in. on a blueprint.
The scale is 2 in. = 16 ft.
What is the actual length in feet of the patio?
117.6 ft.
2/8 divided by 5 =?
2/ 40 or 1/20
What is the unit rate?
3 ft. = 930 miles.
1 ft = 310 miles.
What is the exact circumference of a circle with a diameter of 13?
13 π
What is the exact area of a circle with a diameter of 10 in?
25π
The scale on a map is 2 in. = 50 miles.
The driving distance on a map from Chicago to Dallas is 36in.
What is the actual amount of miles from Chicago to Dallas?
900 miles
True or False
The ratio of 5 : 1/7 has a unit rate of 35.
True
A farm stand sells oranges in 3 lb. bags. Each bag costs 3.75. Write an equation to represent the cost, c, for p pounds of oranges.
c=1.25p
What is the exact circumference of a circle with a Radius of 5 in?
10 π
What is the exact area of a circle with a diameter of 12 in?
36π
The length and width of a room on a blueprint is 4.6 in. by 6.5 in. The scale is 1in. = 4ft.
What is the actual area of the room in feet?
478.4 ft. 2
A marching band walks 1/15 mil. in 15 minutes. At this rate, how long will it take them to complete 1 mile?
22.5 minutes.
(1,3) (5,15) (6,16) (10, 20)
Would these points make a proportional relationship?
NO
What is the approximate circumference of a circle with a radius of 15 in?
94.2 in.
What is the approximate area of a circle with a radius of 8 in?
200.96 in2
The length and width of a playground is 5.8 in. by 9.2 in. The scale is 6 in = 42 ft.
What is the actual area of the playground in feet?
2,614.64 ft. 2
Janelle is viewing an image of a sculpture. She enlarges the image using a scale of 0.2 cm = 1.8 ft. How many centimeters in the image are used to show 1 ft?
1.6 cm.
What is the unit rate of this graph?
1, 3
What is the diameter of this circle?
C= 63π
63
What is the radius of this circle?
C=14π
7