Concept explainers
The landing distance that a certain plane will travel on a runway is determined by the initial landing speed at the instant the plane touches down. The function D relates landing distance in feet to initial landing speed s:
where s is in feet per second.
a. Find the landing distance for a plane traveling 150 ft/sec at touchdown.
b. If the landing speed is too fast, the pilot may run out of runway. If the speed is too slow, the plane may stall. Find the maximum initial landing speed of a plane for a runway that is 1000 ft long. Round to one decimal place.

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Chapter 11 Solutions
LC BEG & INT ALGEBRA
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