In circle "p" below, determine the length of arc st to the nearest 10th, if pr = 6 units.
a. 7.3 units
b. 7.5 units
c. 7.7 units
d. 7.9 units

Please see the pic, I'd solved it in the pic.

The formula for finding the length of an arc is:
                                   × 2r

Lets apply the formula:
                 Length of Arc= × 2(6)
                                      = × 12
                                      =
                                      =7.33 units

A. 7.3 units