3. determine a lower bound for the radius of convergence of series solutions about each given point ro for the given different ial equation (a) y"4y6ry = 0; (b) (z2- 2r -3)"+ry'4y 0; ro 0, o4 ro4, ro= -4, ro = 0.

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?

The graph of y=x3 is transformed as shown in the graph below. which equation represents the transformed function?

A10 inch cookie cake is divided into 8 slices. what is the area of 3 slices