Flask a contains photosynthetic green algae in water while flask b contains water with no algae. both are placed under lights set to cycle between 12 hours of light and 12 hours of dark. if the dissolved oxygen concentrations in both flasks are monitored, how will the dissolved oxygen concentration in the flask with algae compare to the control flask?

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39

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.

In 2009, there were 1570 bears in a wildlife refuge. in 2010, the population had increased to approximately 1884 bears. if this trend continues and the bear population is increasing exponentially, how many bears will there be in 2018?