A15 in. windshield wiper makes a 150° arc across the windshield.
about how far does the end of the windshield wiper travel?

inches.

Step-by-step explanation:

The question gives the central angle and radius of an arc and is asking for the length.

An arc is part of a circle. What is the circumference of a circle with a radius 15 inches?

inches.

However, this wiper traveled only a fraction of the circle. A full circle is . The central angle of this arc is only . As a result,

.

The length of the arc will thus be

.

In other words, the windshield wiper traveled approximately 39.3 inches.

b

step-by-step explanation:

the word superfluous means unnecessary