If each whole wiggle (wave) takes 0.29 seconds, how many times can it do a
whole wiggle in one second? (look at the
top of the screen)
f = 0.29 Hz
(it takes more than one second to make one
whole wave)
frequency = 3.4 Hz
(about 3 and a half waves per second)

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So since the snail is moving at 3.6  miles per hour you multiply by 5280 to change it into feet per hour. so you get 36*528 ft per hour. since there are 3600 seconds in an hour, you divide 36*528 by 3600. so simplifying we get 528/100 which is 5.28 ft per second