Please I really need your HELP This is a simple math word pr

Please! I really need your HELP! This is a simple math word problem, but I still have difficulty solving it. The correct answer is B. I would like to know how to solve it step-by-step. Here is the problem:

Kerri ran the same distance in four different races. Her times were 18.04 seconds, 21.39 seconds, 12.99 seconds, and 14.14 seconds. If the individual times are rounded to the nearest one-tenth of a second, what is the estimate of Kerri\'s total time for all four races? A. 66.6 seconds B. 66.5 seconds C. 66 seconds D. 65.5 seconds E. 61.56 seconds

Solution

66.5 sec