How is using mental math to add with decimals like using mental math to add whole numbers

Acircle has the equation (x-2)^2 +y^2 =5. what are the coordinates of the circle's center?

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 term below correctly completes the following sentence? if a function has a vertical asymptote at a certain x value, then the function is what at that value