Answer:
12.5 meters
Step-by-step explanation:
Given
--- Jasen
--- Mary
Required
Determine the number of metres left for Mary when Jason finishes
When Jasen finishes the race;
-- Because Jasen is already at the stoppage
So, we need to calculate time spent by Jasen to get to the finished line.

Substitute 0 for J(t)

Collect like terms

Solve for t


What this implies is that: we want to get Mary's distance at time;

Substitute 25 for t in




Hence, Mary has 12.5 metres left