College Algebra (Abridged)

Solution: In this case, ℎ = 7 , substituting the value of ℎ in the equation, we get: 7 = 2 2 − 9 + 11 2 2 − 9 + 4 = 0 Using the formula, = − ± √ 2 − 4 2 Where, = 2 , = − 9 and = 4 , substituting the values we get: = − ( − 9) ± � ( − 9) 2 − 4(2)(4) 2(2) = 9 ± √ 49 4 = 9 ± 7 4 So the ball will be at a height of 7 feet when at ½ second and 4 seconds. Question 6: D Solution: Using FOIL, we get: ( ) = ( − 5)( − 5) = 2 − 5 − 5 + 25 = 2 − 10 + 25 To find the -intercept, substitute 0 in for : (0) = 0 2 − 10(0) + 25 = 25 Question 7: A Solution: To find the -intercept, substitute 0 in for : ( ) = (0) = 0 = 1 (any Real number raised to the 0 power equals 1) Question 8: C Solution: We know that log = 4 . Next, convert from logarithmic form to exponential form: 2 4 = . Therefore, 16 = . Question 9: B

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