If sin theta= -4/5 and theta is in quadrant 4, find tan theta

The graph shows the distance y, in inches, a pendulum moves to the right (positive displacement) and to the left (negative displacement), for a given number of seconds x. how many seconds are required for the pendulum to move from its resting position and return? enter your answer in the box.

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.

Alex measured the length of an item to be 3.7 cm. the actual length is 3.5 cm. what is alex’s percent error?