Bao has been notified by his electric company that his rates are going up on his graduated fee schedule. he currently pays: standard use plan 6.5 cents/kwh for the first 600 kwh 12 cents/kwh for the next 600 kwh if his rates go up 1 cent in each category, find how much he will pay if he uses 875 kwh per month. round to the nearest dollar. a. $72 b. $105 c. $66 d. $81

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?

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.