Question

Pleaseeee helpppp???? :)))))))))
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Answer 1

(a) 28π cm

(b) 88 cm

Explanation:

Part A — Give an exact answer in terms of π.

To find circumference of a circle, our formula is:

`\displaystyle \large{C=2\pi r}`

Where:

• C = circumference
• r = radius

Radius is,the line segment or value from center to one of endpoints. Our radius is given as 14 cm in the shown attachment.

Henceforth, our circumference is:

`\displaystyle \large{C=2\pi \cdot 14}\\\displaystyle \large{C = 28\pi}`

So for part A, the circumference is 28π cm.

Part B — Use π ≈ 22/7 and express your answer as a fraction in lowest terms.

For this part, use the circumference that we solved from part A:

`\displaystyle \large{C=28\pi}`

Substitute π = 22/7 in.

`\displaystyle \large{C \approx 28\cdot (22)/(7)}\\\displaystyle \large{C \approx 4\cdot 22}\\\displaystyle \large{C \approx 88 \ cm}`

Henceforth, the circumference in Part B is approximately 88 cm.