amy has a living room 6.5m width 4.5m length door way is 900m and fireplace is 1.2m. so skirting board lenght are 2.4m. How many lenght she needs for skirting board?

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.

A11 gram sample of a substance that’s used to treat thyroid disorders has a k-value of 0.1247

Write an expression that shows 3 more than 5 times a number