4. Find mDF (arc length in degrees) 12 in. 15.7 in.

Use your calculator value of to find the approximate area of a circle with radius length 12.38 in.

A metal circular disk whose area is 143 cm2 is used as a knock out opening on an electrical service in a factory. Use your calculator value of to find the length of the radius of the disk to the nearest tenth of a cm.

Use your calculator to find, to two decimal places the lengths of the radius and the diameter of the circle with area 56.35 in2.

When radii OA and OB are placed so that they coincide, a 240 sector of a circle is sealed to form a right circular cone. If the length of the radius of the circle is 6.4 cm, what is the lateral area of the cone that is formed? Use a calculator and round the answer to the nearest tenth of a square inch.

An exit ramp from one freeway to another freeway forms a 900 arc of a circle. The ramp is scheduled for resurfacing. As shown, its inside radius is 370 ft, and its outside radius is 380 ft. What is the area of the ramp to the nearest integer?

The central angle corresponding to a circular brake shoe measures 60. To two decimal places how long is the curved surface of the brake shoe if the length of the radius is 7 in.

Find the area of an equiangular triangle with a a perimeter of 24.6 cm. b radius of length 4 in.

What is the radius of a circle with a circumference of 27.36 cm. Round the answer to 2 decimal places.

Find the size of A to the nearest second?