Barry can run 3/8 of a race in 1/2 hour.
Enter the amount of the race Barry can run in 1 hour.

6/8

Step-by-step explanation:

we need to calculate 3/8 + 3/8 = 6/8

3/4

Step-by-step explanation:

1 hour is 2 times 1/2 hour.

2 * 3/8 = 6/8 = 3/4

b. hannah is playing with her cousin at

the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.