An automobile windshield wiper 26 inches long rotates through an angle of 60°. If the rubber part of the blade covers only the last 20
inches of the wiper, find the area of the windshield cleaned by the
windshield wiper.

Step-by-step explanation:

The area of a sector with radius and central angle is given by . Note that a sector is a part of a circle which is the area created by the windshield wiper.

We're given:

Substituting given values, we have:

(round as necessary).

3,6 and 7.

step-by-step explanation:

a) unit place of 37 is 7

so the unit place of cube of 37 will be

7³= 343=3

the answer is 3.

b) unit place of 56 is 6, so the unit place of cube of 56 will be

6³= 216=6

the answer is 6.

c) unit place of 133 is 3, so the unit place of cube of 133 will be

3³= 27= 7.

the answer is 7.