Question

The area of the front face of the analog clock shown below is 78.5 square inches. The length of the minute hand is 0.25 inches less than the radius of the front face.What is the length of the arc, rounded to the nearest hundredth of an inch, the minute hand makes when it moves from the number 4 to the number 10 on the clock?
Answer
14.92 inches
15.7 inches
22.08 inches
29.83 inches

Answer 1

First find the radius of the clock face. Can you do that?

Answer 2

no

Answer 3

I dunno how

Answer 4

\[A=\pi r^2\]
What is the area given?

Answer 5

78.5 square inches

Answer 6

Replace A with 78.5 and then divide both sides by 3.14 which is pi

Answer 7

78.5/3.14?

Answer 8

Yes. What did you get?

Answer 9

25