TIME REMAINING 45:07
C D
Sisters Sharon and Karen enjoy sleeping. Let X represent the number of hours Sharon sleeps each night, and let y
represent the number of hours Karen sleeps each night. The mean of X is 7.9, and the mean of Y is 8.4 Which
answer choice correctly calculates and interprets the mean of the sum, S=X+Y?
Os=0.5; the mean amount of sleep Sharon and Karen get is 0.5 hours nightly
OWS 8.15 the mean amount of sleep Sharon and Karen get is 8.15 hours nightly
=8.15: Sharon and Karen can expect to sleep a total of 8.15 hours, on average, nightly
O Ws = 16.3, Sharon and Karen can expect to sleep a total of 16.3 hours, on average, nightly
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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 bsuppose 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 cnow try a numerical problem. what is the direction of the vector w = < -1, 6 > ?