College Math

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 Solution: We can solve this question by substituting the given values of and into the inequalities. The option that satisfies both the inequalities is the correct answer.

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