The scores on a psychology exam were normally distributed with a mean of 60 and a standard deviation of 10 . a failing grade on the exam was anything 2 or more standard deviations below the mean. what was the cutoff for a failing score? approximately what percentage of the students failed? the cutoff for a failing score was nothing . (simplify your answer.) approximately nothing percent of the students failed. (round to one decimal place as needed.)

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

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

Statement reason 1. δabc is similar to δced. given 2. 3. definition of slope 4. slope of slope of definition of slope 5. slope of × slope of multiplying the slopes 6. slope of × slope of substitution property of equality 7. slope of × slope of simplifying the right side the table contains the proof of the relationship between the slopes of two perpendicular lines. what is the reason for statement 2? a. parallel line segments that meet a common perpendicular line are proportional in length. b. the lengths of vertical and horizontal sides in congruent triangles are in a common ratio. c. trigonometric identities determine the lengths of the legs in a right triangle. d. corresponding side lengths in similar triangles are proportional in length.