Rotate the point A (-3,4) 270°about the origin. Plot A' on the grid.

I'm confused on this could anyone me and show me what i need to do to solve it.

The evening newspaper is delivered at a random time between 5: 30 and 6: 30 pm. dinner is at a random time between 6: 00 and 7: 00 pm. each spinner is spun 30 times and the newspaper arrived 19 times before dinner. determine the experimental probability of the newspaper arriving before dinner.

Factor the polynomial. b^2 + 4b + 4