Unit 3: Scale factor and Area mini practice

The model of a swimming pool has the area of 52 in.  What is the area of the actual pool if the scale factor is 3.5?

• 18.2 inches squared
• 637 inches squared
• 104 inches squared
• 12.25 inches squared

The length of a rectangular prism changes from 6 feet to 18 feet.  What is the scale factor of the change?

• 1/3
• 3
• 2
• .3

Tags

CCSS.3.OA.D.9

A rectangle has dimensions of 3 x 5 inches. The image is created with a scale factor of 1/2. What is the  area of the image?

• .75 square inches
• 3.75 square inches
• 60.0 square inches
• 1.5 square inches

If the length of the pre-image  is 12 units and the scale factor is 1/4 what is the length of the image?

• 300
• 4.8
• 3
• 4

Tags

CCSS.7.RP.A.2C

An architect is drawing a house and decides that 1.5 inches = 2 feet in his drawing. In real life the living room has a length of 17 feet. What is the length of the room  on his blueprint (drawing)?

• 12.75 inches
• 15.5 inches
• 22.67 inches
• 51 inches

Tags

CCSS.6.RP.A.3D

Find the AREA of the image - if this pre-image was dilated by a scale factor (r) of 4.

• 160 square feet
• 160 feet
• 2560 feet squared
• 1600 feet