The average attendance of Everton football club fell by 7% in 1982. If 2030 fewer people went to matches in 1982, how may went in 1981?

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

Abcd is a square. what is the measure of angle bac

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.