Review word problems ? 1.) one liter of gasoline costs 40 cents. there is also a tax of 2 cents. what percent of the cost is the tax ? 2.) the smith family made a down payment of $30,000 on a house. this is 25% of the price of the house. what was the price of the house ?

Which statement about the relative areas of δabc and δxyz is true? the area of δabc > the area of δxyz the area of δabc < the area of δxyz the area of δabc = the area of δxyz more information is needed to compare.

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.

Aramp rises 4 feet over a distance of 10 feet. what is the length of the ramp?