Anfernee bought 4 umbrellas and 5 hats and spent between $80 and $100. Each umbrella costs the same amount. Each hat costs the same amount. The price of a hat is $4.00. What is the least amount Anfernee could have spent on an umbrella? What is the most Anfernee could have spent on an umbrella?

Which expressions are equivalent to k/2 choose 2 answers: a k-2 b 2/k c 1/2k d k/2 e k+k

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 of the following statements would be sufficient to prove that parallelograms pqrs is a rectangle ?