Answer: 
Step-by-step explanation:
Given
Path is changing according to the function 
Rate of change of the elevation is given by the derivative of the function

At 

Here is the work with the answer. Hope this helps. God bless
Answer:
28,389
Step-by-step explanation:
8 divided by 1/4 (25%) is 2. Therefor, it would be 10 meters.
Maybe less than 4hrs since there’s two working together and since malia can complete less than Paige