A missle is fired vertically into the air. The distance (in metres) above the ground as a function of time is given by the formula s = 100 + 500t – 4.9t2. When will the missile return to earth?

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Posted by Admin in Wednesday, February 2nd 2011 3 comments already

A missle is fired vertically into the air. The distance (in metres) above the ground as a function of time is given by the formula s = 100 + 500t – 4.9t2. When will the missile return to earth?

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dsf Said,

February 2nd, 2011 @2:53 pm

The missile returns to earth when s, the distance above the ground is 0.

0 = 100 + 500t – 4.9tÂ²

Use the quadratic formula to solve for t. http://www.1728.com/quadratc.htm

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