Brittany's family went to dinner at her favorite resturant because her father had a coupon for 15% off . her father said if she could correctly figure out the total cost of dinner ,including the 6 1/2 sales tax, he would take them all out for frozen yogurt on the way home. the meal costs 53.52 without the discount .brittany determined the total, with the discount and sales tax ,will be $44.50. did brittany figure it out correctly? show your work to support your answer.

I've been working on this for a few days and i just don't understand, it's due in a few hours. you. the direction of a vector is defined as the angle of the vector in relation to a horizontal line. as a standard, this angle is measured counterclockwise from the positive x-axis. the direction or angle of v in the diagram is α. part a: how can you use trigonometric ratios to calculate the direction α of a general vector v = < x, y> similar to the diagram? part b suppose that vector v lies in quadrant ii, quadrant iii, or quadrant iv. how can you use trigonometric ratios to calculate the direction (i.e., angle) of the vector in each of these quadrants with respect to the positive x-axis? the angle between the vector and the positive x-axis will be greater than 90 degrees in each case. part c now try a numerical problem. what is the direction of the vector w = < -1, 6 > ?