A hairdresser is considering ordering a certain shampoo from two different companies. Goldie's Locks charges S4 per bottle plus a $10 shipping and handling fee. Three Bears' Hair charges S3 per bottle plus a $25 shipping and handling fee. How many bottles must the hairdresser buy for both companies to cost the same? How many bottles must she buy to justify using Three Bears' Hair? a) write an expression for the cost of both companies
b) create an equation
c) solve the equation

If the class was going to get a class pet and 5 picked fish and 7 pick bird and 8 picked rabbits have many students were in the

Suppose i pick a jelly bean at random from a box containing one red and eleven blue ones. i record the color and put the jelly bean back in the box. if i do this three times, what is the probability of getting a blue jelly bean each time? (round your answer to three decimal places.)

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.