Protons are positive and electrons are negative. if an atom has 12 protons and 15 electrons. what is the overall charge?

Which of the following is the missing term, a2, of the geometric sequence in which a1=2 and a3=200

The function models the number of accidents

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.