For which interval(s) is the function increasing and decreasing?

y = 3x^3 - 16x + 2

Please show your work. Thanks.

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

In which form is the following function written? y = - 2(x – 3)(x + 5)

Zoey made 5 1/2 cups of trail mix for a camping trip. she wants to divide the trail mix into 3/4 cup servings. a. ten people are going on the trip. can zoey make enough 3/4 cup servings so that each person gets one serving? b. what size would the servings need to be for everyone to have a serving?