Find the exact area of the sector of the circle with the following radius and central angle

Given the following sampling distribution of one mean with a sample size 49, from a normally distributed population, find the population standard deviation, o.79828588912497

Which region represents the solution to the given system of inequalities? |-0.5x+y23 | 1.5x+ys-1 5 4 -3 -2 -1 1 2 3 4

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)