f(x) = log2 x
f(40) = log2 40
40 = 2^y
2^5 = 32 and 2^6 = 64
so f(40) lies between integers 5 and 6.
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Find Radius
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Radius = Diameter ÷ 2
Radius = 32 ÷ 2
Radius = 16
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Find Area
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Area = πr²
Area = π x 16²
Area = 256π mm²
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Answer: 256π mm²
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Try to do the answer of -4
Y=2x-1 because (y2-y1)/(x2-x1) is 10/5 which is two. Using point slope form y-y1=m(x-x1) we find y=2x+1.