8th grade math PLEASE HELP!
posted by Katharine .
At Eglinton subway station the 54 Lawrence bus leaves the station every 18 minutes. The 34 Eglinton Bus leaves every 30 minutes. The 28 Mt Pleasant Bus leaves the station every 11 minutes. Assuming the buses run 24 hours a day at what time interval do all three buses leave the station together?(Show all steps, write the answer in hours)

the distance a person can see at sea is measured in miles by using the formula d=the square root of 3over 2 h is the height in ft above sea level.About how many miles can a person see that is 8ft above sea level?round the answer to the nearest tenth of a mile.

the buses meet every 16 hours and 30 minutes