1 answer:
Answer:
a) r = 7in
b) d = 30cm
Step-by-step explanation:
A = *
A = area of a circle
r = radius
a)A = *
we divide by both sides of the equations
=
lets apply square root to both sides of equality sign:
so we have:
r=7 in
b)d= diameter
r=radius
d=2*r
r=15 cm
so we have:
d=2*15cm= 30cm
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