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4. [-/1 Points] DETAILS HARMATHAP12 10.2.003. MY NOTES ASK YOUR TEACHER Determine whether the function is concave up or concave down at the indicated points. g(x) = 2x*- 5x + 14x - 3 (=) x = 2 O concave up O concave down (b) x = = O concave up O concave down 5. [-/1 Points] DETAILS HARMATHAP12 10.2.039. MY NOTES ASK YOUR TEACHER Suppose that a company's daily sales volume attributed to an advertising campaign is given by the following equation. 4 12 (t + 4)2 + 5 (=) Find how long it will be before sales volume is maximized. t = ] | days (b) Find how long it will be before the rate of change of sales volume is minimized. That is, find the point of diminishing returns. t = days 6. [-/1 Points] DETAILS HARMATHAP12 10.3.004. MY NOTES ASK YOUR TEACHER Find the absolute maxima and minime for f(x) on the interval [a, b]. ((x) = x - 3x - 45x + 3, [-4, 6] absolute minimum (x, y) = absolute maximum (x, y) =