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    Solving an Equation by Substitution

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    If air resistance is neglected, the number of feet "s" that an object falls during "t" seconds is given by the equation s = 16t^2. How long would it take for an engine of an airplane to reach the earth if it fell off the airplane at 32,000 feet?

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    Solution Summary

    An equation is solved by substituting a value for a variable.