Dr. black is standing 13 feet from a streetlamp. the lamp is making his shadow 9 feet long. he estimates that the angle of elevation from the tip of his shadow to the to top the streetlamp is 50 degrees. to the nearest foot, the streetlamp is about:

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 0 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)

Given: ∆mop p∆mop =12+4 3 m∠p = 90°, m∠m = 60° find: mp, mo

Bring the fraction a/a-4 to a denominator of 16-a^2