A class' test scores are normally distributed with a mean of 48 points and a standard deviation of 3 points. What
percentage of test scores are are between 47 and 52 points? Round to the nearest hundredth of a percent.

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.