9. On level farmland, two runners leave at the same time from the intersection of two country roads. One runner jogs due north at a constant rate of 8 miles per hour while the second runner jogs due east at a constant rate that is 42 miles per hour faster than the first runner's rate. How far apart, to the nearest mile, will they be after 1/2 hour ?  Choose the correct choice from the following options:
A) 6
B) 7
C) 8
D) 12
E) 14
If runner 1 is going north and runner 2 is going east they are like two sides of a 90 degree triangle.   Side 1 = 8 m/h --&gt; 4 m in 1/2 hr   Side 2 = 10 m/h --&gt; 5 m in 1/2 hr   to complete this right angle triangle   d^2 = 4^2 + 5^2   d^2 = 41   = ~ 6   6nswer option 6
<result>A</result>
9. On level farmland, two runners leave at the same time from the intersection of two country roads. One runner jogs due north at a constant rate of 8 miles per hour while the second runner jogs due east at a constant rate that is 42 miles per hour faster than the first runner's rate. How far apart, to the nearest mile, will they be after 1/2 hour ?