Find the measure of angle B

Step-by-step explanation:

Use the Law of Cosines for this. If we want the measure of angle B, then the equation is set up like this:

Filling in:

and simplifying a bit:

81 = 196 + 36 - 168cosB and a bit more:

81 = 232 - 168cosB and even more:

-151 = -168cosB and divide both sides by -168 to get

.9378881988 = cosB

Now use the 2nd button on your calculator along with the cos button to find the missing angle. Make sure your calculator is in degree mode first. Your angle should be 20.30012152

Both speeds (quarter horse's and snail's) are already in mph. This means that to be able to determine how many times is the quarter horse faster than a snail, we just have to divide the quarter horse's speed by the speed of the snail.
                      r = 53.16 / 0.02 = 2658
Therefore, the quarter horse is 2658 times faster than the snail.