Answer:
A. 3yd
Explanation:
There are two formulas that can be used for the circumference of a circle:
c = πd and c = 2πr
Since we want to solve for the radius, let's use c = 2πr
The circumference, 'c', is 18.84 inches
Since 'π' is an irrational number, we use its approximation of 3.14
We are trying to solve for 'r', which is the radius
The circumference, 'c', is 18.84 inches
Since 'π' is an irrational number, we use its approximation of 3.14
We are trying to solve for 'r', which is the radius
Plugging in, we get:
18.84 = 2(3.14)r
Since 'π' is an irrational number, we use its approximation of 3.14
Notice there are the same amount of decimal places (two!) in the answer as the combined amount of spaces in the numbers being multiplied!
18.84 = 6.28r
The goal is to isolate and solve for 'r', which is the radius
18.84/6.28 = 3
So we get "3 = r", which means the radius is 3 inches!