Final answer:
The difference between the highest elevation and the lowest elevation at the park is 359 feet, which is obtained by adding the elevation of the mountain top (310 ft) and the absolute value of the valley bottom (-49 ft).
Step-by-step explanation:
The difference between the highest and lowest elevations at the park is calculated by subtracting the elevation of the bottom of the valley from the elevation of the top of the mountain. So, we take the elevation at the top of the Mountain (310 ft) and subtract the elevation at the bottom of the Valley (-49 ft).
This gives us: 310 ft - (-49 ft) = 310 ft + 49 ft = 359 ft.
The total difference in elevation is therefore 359 feet.