It is known that the number of trees in a small forest go to Chris by 5% each year unless some new trees are planted. At the end of each year 600 new trees are planted to the forest at the start of 2021 and there are 8200 trees in the forest. (a) Show that there will be roughly 9060 trees in the forest at the start of 2026.
(b) Find the approximate number of trees in the forest at the start of 2041.

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)

This is about circle theorems. someone asap : (

Which is the focus of a parabola with equation y2=4x