To find Jenny's age as a percentage of her great grandmother's age :

3)
fixed cost =$ 99
variable cost per hour = $ 19
total cost can be given as
t = 99 + 19h
where h is number of hours vehicle used.
4) weekend daily cost is $ 29.99
total day she rented = friday + saturday + sunday = 3 days
so total rent = 29.99 × 3 = $ 89.97
Answer:
they would have traveled 124.1 meters. If you start at 0 elevation (ground level) and you go all the way down then the maximum lowest point he can get to is 124.1m.