The best bench mark to use is an inch. She should use an inch because centimeters are too small and the steps might be less than a foot.
Answer:
A tape diagram. StartFraction part Over whole EndFraction = StartFraction 300 Over 100 EndFraction = StartFraction 75
Step-by-step explanation:
The answer will be y=-5/2x+5
She can only talk for 400 minutes or 6 hours and 40 minutes