conversions i need help solving this its asking me to convert 30 ft per second into

Question

mph please help me

Answer 1

20.45 mph

solution: 30ft X 1 mi X 60 S X 60 min
= 108000
108000/ (1s X 5280 ft X 1 min X 1hr) = 20.45 mph

Answer 2

30 ft/sec (3600 sec/hr) (1mile/5280ft)

sec cancels
ft cancels

= 30 *3600/5280 in miles/ hours

Answer 3

See what I did Beth ? Easier