26-27 Time Rates: Kite moving horizontally

Problem 26
A kite is 40 ft high with 50 ft cord out. If the kite moves horizontally at 5 miles per hour directly away from the boy flying it, how fast is the cord being paid out?

Solution 26

 

Problem 27
In Problem 26, find the rate at which the slope of the cord is decreasing.

Solution 27

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