If Z is a standard normal variable find the probability. The probability that a lies between -1.1 and -.36

Data are collected to see how many ice-cream cones are sold at a ballpark in a week. day 1 is sunday and day 7 is the following saturday. use the data from the table to create a scatter plot.

What is the range of the relation in the table below? x y –2 0 –1 2 0 4 1 2 2 0

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.