Naomi is riding her bicycle at a constant rate of 0.3 miles per minute. vivian is riding her bicycle at a constant rate of 0.5 miles per minute and is 1 mile behind naomi on the same road, riding the same direction. if the girls ride at constant rates, how many minutes will it take vivian to be riding next to naomi?

It will take 3 minuites because 0.5 time 3 equals 1.5 mpm while 0.3 times 3 equals 0.9 

it will take three minuite

It will take 5 minutes because the first minute Vivian is 0.5 miles and Naomi is 1.3 miles the second minute Vivian is 1 mile and Naomi is 1.6 miles the third minute Vivian is 1.5 miles and Naomi is 1.9 miles the fourth minute Vivian is 2 miles and Naomi is 2.2 miles the fifth and last minute Vivian is 2.5 miles and Naomi is 2.5 miles.

What am i doing here. add?