Hi student, let me help you out! :)
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We are asked to find the area of this circle.
→
Notice that we are asked to use 3.142 for
(pi).
The radius isn't given to us; what we have instead is...the diameter.
To find the radius, we divide the diameter by 2.
Remember this...
Thus, the radius is
Now substitute the values (3.142 for pi and 4.5 for r):
Simplifying,
Simplifying,
Rounding to 2 decimal places (D.P.):
Hope it helps you out! :D
Ask in comments if any queries arise.
~Just a smiley person helping fellow students :)