February 24, 2017

Homework Help: Math

Posted by sophie on Friday, May 29, 2009 at 7:43pm.

The paddle wheel of a boat measures 16 feet in diameter and is revolving at a rate of 20 rpm. The maximum depth of the paddle wheel under water is 1 foot. Suppose a point is located at the lowest point of the wheel at t=0.

1. Write a cosine function with phase shift 0 for height above water of the initial point after t seconds.
a. h=8cos((2π)/2 t)+7
b. h=-8cos3t+7
c. h=-8cos((2π)/3 t)+7
d. h=8cos3t+7

I think this is C?

2. use your function to find the height of the initial point after 5.5 seconds.
a. 7.5 ft
b. 11 ft
c. 10.4 ft
d. 6.5 ft

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