Based on previous attendance, the managers for a summer concert series estimate the probability that a person will attend any one event to be 90%. The chairs set up around the stage seat 450 people. If the managers want to be at full capacity every concert, how many tickets should they sell?​

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.

Given: m∠ adb = m∠cdb ad ≅ dc prove: m∠ bac = m∠bca lol

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.