Answer: yes
Step-by-step explanation: you got it
Since they are moving in opposite directions, this is the same as Amy staying still and Erica biking at 10 meters per second away from her.
To travel 1km = 1000m at 10 meters per second, you need 1000/10 = 100 seconds.
Yes because it says unlimited number to ANy given fraction..... Thats what i would say anyway