# Test 4.docx - Started on State Completed on Time taken...

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Started onStateCompleted onTime takenGradeQuestion Correct8.75 points out of 8.75Flag questionQuestion textWrite the domain in interval notation.f (x) = x2−81x+9x2−81x+91Select one:a. (-∞, ∞)b. (-∞, -9) U (-9, ∞) c. (-∞, -9] U [-9, ∞)d. (-∞, 9) U (9, ∞)FeedbackThe correct answer is: (-∞, -9) U (-9, ∞)
Question Correct8.75 points out of 8.75Flag questionQuestion textRefer to the graph of the function and complete the statements.2
The graph is increasing over the interval(s) ________.The graph is decreasing over the interval(s) ________.
Question Correct8.75 points out of 8.75Flag questionQuestion textIdentify the asymptotes.f (x) = 2x2+7x2x2+7x3
x
xQuestion Correct8.75 points out of 8.75Flag questionQuestion textSolve the problem.The population P(t) of a bacteria culture is given by P(t)=−1,500t2+48,000t+18,000P(t)=−1,500t2+48,000t+18,000, where tis the time in hours after the culture is started. Determine the time(s) at which the population will be greater than 388,500 organisms.4