Last year, the standard deviation of the ages of the students at ua was 1.8 years. recently, a sample of 31 students had a standard deviation of 2.1 years. we are interested in testing to see if there has been a significant change in the standard deviation of the ages of the students at ua. the null hypothesis is

Using two or more complete sentences, describe how you can find a vector parallel to b=-2,3

Find the root(s) of f (x) = (x- 6)2(x + 2)2.

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 > ?