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Unformatted text preview: function s(t) = 16t 2 + 112t + 240 models the ball's height above the ground, s(t), in feet, t seconds after it was thrown. After how many seconds does the object reach its maximum height? Round to the nearest tenth of a second if necessary. Solve the equation by making an appropriate substitution. 11) x 2/3 6x 1/3 + 5 = 12) x2 + x1 6 = 2 Answer Key Testname: 120_CH.13_REVIEW 1) {2 + 2 5 ,2 2 5 } 2) {7 15 ,7 + 15 } 3) {1 ± i 19 2 } 4) Two imaginary solutions 5) x 2 6x 40 = 6) x 2 + 100 = 7) x105 5 10 y 10 5510 Vertex: (1, 4) xintercepts: (1, 0) and (3, 0) yintercept: (0, 3) axis of symmetry: x = 1 8) minimum; ( 1, 3) 9) maximum; (1, 4) 10) 3.5 seconds 11) {1, 125} 12) { 1 3 , 1 2 } 3...
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 Spring '08
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 Radicals, Quadratic equation, imaginary solutions

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