In the formula that gives the circumference of a circle, which quantity is multiplied by 2ï€ ?

a. diameter
b. radius
c. area
d. circumference

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

Fa bus driver leaves her first stop by 7: 00 a.m., her route will take less than 37 minutes. if she leaves after 7: 00 a.m., she estimates that the same route will take no less than 42 minutes. which inequality represents the time it takes to drive the route, r?

What is the distance between a and b? round your answer to the nearest tenth. a coordinate plane is shown. point a is located at negative 1, 5, and point b is located at 4, 1. a line segment connects the two points.