Igor, whose eye height is 4.5 ft., wishes to find the height of an oak tree out in front of his castle. He places a mirror on the ground between himself and the tree. He is now 5 ft. from the crosshairs of the mirror and the mirror is 70 ft from the tree. How tall is the oak tree?
Show ALL work and include a diagram as part of the answer

If you are just building your payment history, how many points from a perfect score will you possibly miss?

Identify the number as a rational or irrational. explain. 127

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 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)