The table shows the numbers of cellular phone subscribers S (in millions) in the United states from 1999 through 2004, where t represents the year, with t = 9 corresponding to 1999. Use the regression feature of a graphing utility to find a linear model for the data. Use the model to find the year in which the number of subscribers exceeded 200 million.

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.

What is the greatest number of parts of a circle that can be formed by cutting the circle with 7 straight cuts? (note: the parts do not have to be equal in size)