A roller coaster starts from a desk at an elevation of 20 feet above the ground on the first Hill and corn 78 ft and then it drops 85 ft on the second Hill the roller coaster climbs 103 and then drops 110 how far below or above the desk is coaster after the completion of the 2 Hills

6 ft above ground.

Step-by-step explanation:

The roller coaster starts from an elevation of + 20 feet from the ground.

Now, it first corns 78 ft, then drops 85 ft.

So, the final elevation will be (20 + 78 - 85) = 13 feet above the ground on the second hill.

Again, it climbs 103 ft. and drops 110 ft. and finally his elevation will be = 13 + 103 - 110 = 6 ft above ground. (Answer)