Answer:
D, 90
Step-by-step explanation:
See image below.
To find the distance from Bill to Ron, we will use the Pythagorean Theorem, which is a^2+b^2=c^2.
(a and b being the legs of the triangle, they form the 90 degree angle. c=hypotenuse, or the side that is opposite from the 90 degree angle)
In this example, a=30 and b=40.
30^2+40^2=c^2
900+1600=c^2
2500=c^2
c=50.
Then, to find the yards thrown, we will add the distance from Ron to Bill and the distance from Bill to John. This can be written as 50+40, which equals 90 yards.