Lucy and Emily are racing with each other and Lucy is 90 meters in front of Emily. The distance (in meters) that Lucy runs,
for every second t, can be given by A(t)=2t and the distance (in
meters) that Emily runs, for every second t can be given by
B(t)= 5t. How many seconds will it take for Emily to catch up
with Lucy? Give your answer to the nearest whole number.
Enter the answer