Question

Answer this. Show your work. Worth 15 points. Under 1 day. URGENT.

Answer 1

Answer: Choice D) 13 inches

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Work Shown:

C = circumference = 40 inches

d = diameter

$C = \pi*d\\\\C \approx 3.14*d\\\\40 \approx 3.14*d\\\\\frac{40}{3.14} \approx d\\\\d \approx \frac{40}{3.14}\\\\d \approx 12.73885\\\\d \approx 13$

Be careful. Technically 12 inches is the largest diameter Tanya can use since 3.14*12 = 37.68 is under 40; while 3.14*13 = 40.82 is slightly over 40

So if I was the teacher, I would have said "round down to the nearest inch".

Answer 2

Here is the working on this question.