What are the coordinates of point Q?

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)