document.write( "Question 248335: An object is projected directly upward from the ground. After t seconds its distance in feet above the ground is s = 144t – 16t2.\r \n" );
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document.write( "a. After how many seconds will the object be 128 feet above the ground?\r \n" );
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document.write( "b. When does the object strike the ground?\r \n" );
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