C = 2<span>πr
so
r = C/2</span><span>π
r = 3</span>π/2<span>π
r = 3/2
r = 1.5
A = </span><span>πr^2
A = </span><span>π(1.5)^2
A = 2.25</span><span>π
answer
</span><span>2.25π in²</span>
10 pencils will be defective
4/1,000 = 10/2,500 1,000 x 2.5 = 2,500
4 x 2.5 = 10
Hope it helps!!!!!!
Angle of a straight line always sum up to 180 degrees
So what you should do is add the angles that are given to you and then subtract it from 180
Working:
100 + 20 + x = 180
120 + x = 180
x = 180 - 120
x = 60 degrees
I hope this helps you and your welcome
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