Joshua is creating a series of rectangles, one inside the other. The length of the first rectangle, Rectangle A, is five inches. Joshua dilates Rectangle A about its center by a scale factor of two to get Rectangle B. He repeats this process using the same scale factor till he gets a rectangle of length 80 inches.

How many dilations did Joshua perform including the dilation of Rectangle A?

4

2

8

16

Question

Joshua is creating a series of rectangles, one inside the other. The length of the first rectangle, Rectangle A, is five inches. Joshua dilates Rectangle A about its center by a scale factor of two to get Rectangle B. He repeats this process using the same scale factor till he gets a rectangle of length 80 inches. 
 
How many dilations did Joshua perform including the dilation of Rectangle A?

 4

 2

 8

 16

anonymous · Answer

i think the answer is 4, i am not sure though

anonymous · Answer

i agree... 4...
first dilation:  5*2=10
second:  10*2 = 20
third:  20*2 = 40
fourth: 40*2 = 80

anonymous · Answer

ok thank you :)