A rock is thrown off a 75 meter high cliff into some water. The height of the rock relative to the cliff after t seconds is given by the quadratic function=-5t^2+20th ( t ) = − 5 t 2 + 20 t .

Find the sum of the first 8 terms of the following sequence. round to the nearest hundredth if necessary.

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.