Answer:
a) r=4.5 m
b) d= 57 yd
Step-by-step explanation:
a)
The diameter is twice the radius, which can be written as:
d=2r
We know the diameter is 9, so we can substitute that in for d.
9=2r
To solve for r, we need to isolate the variable. To do this, divide both sides by 2
9/2=2r/2
4.5=r
So, the radius is 4.5 meters
b)
The diameter is twice the radius, or
d=2r
We know the radius is 28.5, so we can substitute that in for r
d=2*28.5
Multiply
d=57
So, the diameter is 57 yards
