POINTS Upper quartile and interquartile range of data set (TROLLS OR SCAMMERS WILL BE REPORTED)

1. What is the upper quartile of this data set?
(66,66,67,69,70,72,73,75)

2.what is the interquartile range of the data set shown?
(3,4,4,5,7,10,11,12,15)

Mozart lenses inc. recently introduced seelites, a thinner lens for eyelasses. of a sample of 800 eyeglass wearers, 246 said they would purchases their next pair of eyeglasses with the new lenses. lenses inc. estimates that the number of people who purchase eyeglasses in a year is 1,700,000. most eyeglasses wearer buy one new pair of eyeglasses a year. what is the annual sales potential for the new lenses.

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !

Given sin∅ = 1/3 and 0 < ∅ < π/2 ; find tan2∅ a. (4√2)/9 b. 9/7 c. (4√2)/7 d.7/9