Answer:
and 
Step-by-step explanation:
We have te following expression:

Which can be written as:

Applying common factor 2 in the right side of the equation:

Answer:
D
Step-by-step explanation:





Pythagorean theorem
About 47 inches you have to multiply 15 by pi
Answer:
20ft
Explanation:
You multiply the model length by the scale factor to find the actual length. <u>If the scale factor is less than zero, then the actual size will be smaller than the model</u>. Therefore, your answer would be 20ft.
Specifically, the scale factor is .8 if the actual size is 20ft, 1 if the actual size is 25ft, and 1.2 if the actual size is 30ft.
Answer: 1: B
Step-by-step explanation: