For traffic that flows on a highway, the headway is the average time between vehicles. on four-lane highways, the probability p (as a decimal) that the headway is at least t seconds when there are 500 vehicles per hour traveling one way is given by p = 0.87t. under these circumstances, what is the probability that the headway is at least 15 seconds?

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in geometry, parallel lines are lines in a plane which do not meet; that is, two lines in a plane that do not intersect or touch each other at any point are said to be parallel. by extension, a line and a plane, or two planes, in three-dimensional euclidean space that do not share a point are said to be parallel.

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