If the diameter is 12 inches, the radius is 6 inches, because the radius is half the diameter.
Given the formula

we have

When you fold the circle in half, the resulting figure has half the area.
So, you start with a circle with area 
You fold it once and you have a semicircle with area 
You fold it twice and you have a quarter circle with area 
Answer: 2m+m+m is really the same thing as saying m+m+m+m, or 4m. Use whatever you like as the expression :)
Answer:
1.76 for each marker
Step-by-step explanation:
Answer:
scale factor is 1:3.5
Step-by-step explanation:
56/16 = 3.5
Answer: 75 cm per hour
Step-by-step explanation:
375 divided by 5=75