The gas mileage for a group of cars is normally distributed with a mean of 24 miles per gallon and a variance of 34.81

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.

Which point has an coordinates of (2,0) ? a