Pre-calculus ! express the complex number in trigonometric form. 3 a. 3(cos 0° + i sin 0°) b. 3(cos 90° + i sin 90°) c. 3(cos 180° + i sin 180°) d. 3(cos 270° + i sin 270°)

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.

Which graph has figures that can undergo a similarity transformation to justify that they are similar? (obviously not the third one)

Francis is getting new carpet tiles in his living room and den. his living room and den are connected. he needs to figure out how much carpet he needs and the cost involved. if each tile costs $2.00 per sq ft, how much would it cost to have new tile put in the den? a) $24 b) $36 c) $48 d) $54 plz awnser soon