Select the two values of x that are roots of this equation. x² + 2x - 5=0

A. x = -1+2/6
B. x = -1 + /6
C. x= -1- 2/6
D. x= -1 - /6

The initial distance is 2 2/5 mile or 2.4 miles and the final distance is 8 1/10 mile or 8.1 mile. Therefore the total distance to hike is:

distance = 8.1 – 2.4 = 5.7 miles

Since they will trek at 3 miles per hour, the time needed is:

time = 5.7 mile / 3 miles per hour

time = 1.9 hours

Since they started at 10 am and there is 2 hours allowance from noon, therefore they will reach the marker by noon with 0.10 hour left.