Is a 90° counter clockwise rotation about the origin and then 180° rotation about the origin same as 180° rotation about the origin

Which choice represents the sample space ,s for this event

Factor the monomial completely 42a3b3

The table below shows the approximate height of an object x seconds after the object was dropped. the function h(x)= -16x^2 +100 models the data in the table. for which value of x would this model make it the least sense to use? a. -2.75 b. 0.25 c. 1.75 d. 2.25