Answer:

Step-by-step explanation:
The circumference
of circle of radius
is given by
,
and the diameter
is 2 times the radius:
.
Therefore, the ratio of the circumference to the diameters is

.
Putting in
, we get

Answer:
infinite solutions
Step-by-step explanation:
-3x = -x – 2x
Combine like terms
-3x = -3x
Add 3x to each side
-3x+3x = -3x+3x
0 =0
This is always true so there are infinite solutions
Answer:
75 cm
Step-by-step explanation:
Perimeter of smaller rectangle = 45 cm
Perimeter of larger rectangle = 5/3 * 45 = 5*15 = 75 cm
The answer will be 52*3 + 52*1/2 = 156 + 26 = 182 miles