Ion 5. the thickness of a conductive coating in micrometers has a density function of 600x-2 for 100 μm < x < 120 μm determine the mean and variance of the coating thickness. if the coating costs $0.50 per micrometer of thickness on each part, what is the expected cost of the coating per part

The graph of the function f(x) = (x + 2)(x + 6) is shown below. which statement about the function is true? the function is positive for all real values of x where x > –4. the function is negative for all real values of x where –6 < x < –2. the function is positive for all real values of x where x < –6 or x > –3. the function is negative for all real values of x where x < –2.