Estimation A machine drills a hole into a sheet of aluminum. The radius of the hole is exactly 2.43 in. Round the radius to the nearest inch to estimate the area of the hole. Then find the area of the hole using the exact radius. Use 3.14 for a in both calculations. in ? Using the rounded radius, the area of the hole is about (Round to the nearest hundredth as needed.)​

Step-by-step explanation:

Round to 2 inches

A = π(2²) = 4π = 4(3.14) = 12.56 in²

A = π(2.43²) = 18.541386 ≈ 18.54 in²

i leave the calculator work to you.

7. diameter 4 miles, circumference 4π miles

8. radius 0.2 miles, circumference 0.4π miles

[this is a bad problem because the actual radius of a car on the track is less than 0.2 miles so the answer is less than 0.4π miles]

9. radius 6 feet, circumference 12π feet

10. diameter 14 cm, circumference 14π cm

11. diameter 4.8 feet, circumference 4.8π feet

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step-by-step explanation: