(Solution Library) Total annual textbook sales in a certain discipline are normally distributed. Forty-five percent of the time, sales are above 671,000 copies.
Question: Total annual textbook sales in a certain discipline are normally distributed. Forty-five percent of the time, sales are above 671,000 copies. Ten percent of the time, sales are above 712,000 copies. Find the mean and variance of annual sales.
Deliverable: Word Document 
(See Steps) Distance from coordinate application D=√(x_A-x_B)^2+(y_A-y_B)^2
![[Steps Shown] Coordinate computation application x_B=x_A+D •](/images/solutions/MC-solution-library-45745.jpg "[Steps Shown] Coordinate computation application x_B=x_A+D • sin")
[Steps Shown] Coordinate computation application x_B=x_A+D • sin
![[Solution] Trigonometric leveling application α= sin ^-1((Delta](/images/solutions/MC-solution-library-45746.jpg "[Solution] Trigonometric leveling application α= sin ^-1((Delta")
[Solution] Trigonometric leveling application α= sin ^-1((Delta
(See Steps) Simple Curve Application T=R • tan (Delta)/(2)
(Steps Shown) According to the Information Please Almanac. 80% of
Correlation Coefficient Confidence Interval Calculator - MathCracker.com