4) Astronomers have notice that the number of visible sunspots varies from a minimum of about 10 to a maximum of about 110 per year. Further, this
variation is sinusoidal, repeating over an 11 year period. If the last maximum
occurred in 2003, write the cosine function, n(t), which models this
phenomenon in terms of the time, t, which represents the year.

The following frequency table relates the weekly sales of bicycles at a given store over a 42-week period.value01234567frequency367108521(a) in how many weeks were at least 2 bikes sold? (b) in how many weeks were at least 5 bikes sold? (c) in how many weeks were an even number of bikes sold?

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.

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180