The first thing I would like to help you with is recommend you buy a folder. It will help you keep your work organized and prevent catastrophes like this.
1
12.5 km/h
2
90 km/h
3
It would take about 4.5 seconds.
4
40 minutes
5
A. 0.2km/m
B. 0.5km/m
C. 0.3km/m faster