John ran the 100-m dash with a time of 9.81 sec. if this pace could be maintained for an entire 26-mi marathon, what would his time be?

4104.79 Seconds or about 1.14 Hours

Step-by-step explanation:

26mi = 41842.9m

100/9.81 = 41842.9/x

41842.9 x 9.81 = 100x

410478.849 = 100x

x = 4104.78849

Use the Law of Cosines, since you have 2 side lengths and the measure of the included angle.

The third side could be named "a."  Then, according to the Law of Cosines,

a^2 = b^2 + c^2 - 2(a)(b) cos C, where C is the included angle, and a=b in this particular problem.  Thus,

a^2 = 2b^2 - 2ab cos C.