Acollege administrator would like to estimate the average grade point average (average of gpa) of all the current registered students based on a random sample. he plans to estimate the average gpa to within 0.05 with 90% confidence interval. at least how many students does he need to include in the sample in order to accomplish that? assume the standard deviation of all gpa's in the student population is \sigma σ = 0.4.

Asap for seven months an ice creams vendor collects data showing the number of cones sold a day (c) and the degrees above 70 degrees f the vendor finds that there is a positive linear association between c and t that is the best modeled by this equation c=3.7t+98 which statement is true? the model predicts that the average number of cones sold in a day is 3.7 the model predicts that the average number of cones sold i a day is 98 a model predicts that for each additional degree that the high temperature is above 70 degres f the total of number of cones sold increases by 3.7 the model predicts for each additional degree that the high temperature is above 70 degrees f the total number of cones sold increasingly by 98

If angle 2=3x +1 and angle 3=2x +4what is angle 2

Thelime contains the point(-3,0) and parallel x-3y=3( show all work)