This is so important! HELP PLEASEEE. Consider the quadratic: y = 2(x+1)(x-3) a) Find the location of the x-intercepts
b) Find the equation for the axis of symmetry.
c) Find the location of the vertex
d) Sketch the parabola, clearly showing the vertex and the 2 x-intercepts.

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?