Tommy's salary increases by 4% each year. This year, Tommy's salary was $42,250. How much will her salary be in 7 years? Simplify ALL of the way and round to the NEAREST whole number

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

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.

Hurry if the population of of an ant hill doubles every 10 days and there are currently 100 ants living in the ant hill what will the ant population be in 20 days