The formula for working out the area of a circle is
. r stands for the radius. The radius is the diameter divided by two.
r = d/2
r = 8cm/2
= 4cm
Now you just need to substitute r into the formula for the area of a circle:
=
*16
= 16
(Remember that the area is always given in units squared, in this case cm)
≈ 50.3
Answer:
9
Step-by-step explanation:
Simply plug -3 in for x.
-2(-3)^2-7(-3)+6
(-3)^2=9
9*-2= -18
-7*-3=21
-18+21=3
3+6=9
Answer:
12.34
Step-by-step explanation:
60 miles because 2160 divided by 36 = 60