Simplify then substitute

Please hurry I need it for my grade I have 2 weeks of school left

What rule describes a dilation with a scale factor of 4 and the center of dilation at the origin?

The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.2 days and a standard deviation of 1.7 days. what is the probability of spending more than 2 days in recovery? (round your answer to four decimal places.)

Find the x-intercepts for the parabola defined by this equation: y=-3x^2-6x+9