What are zeros of the function? what are there multiples? f(x) = 4x^3 -20x2 + 24x

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.

Which has the greater energy, light of wavelength 519 nm or light with a frequency of 5.42 x 10^8 sec^-1?