Which statement best describes how to determine whether f(x)=9-4x^2 is an odd function

The triangles are similar. what is the value of x? show your work.

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.

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.