Find the approximate area between the curve f(x) =-2x + 32x+ 5 and the x-axis on the interval [0,16] using 4 rectangles. Use the left endpoint of each rectangle to determine the height.

Answer the questions in the attachment. a rescue helicopter is at point a and a rescue boat is at point e. the helicopter pilot spots boats in distress at points d and c,with angles as marked in the diagram. figure abce is a rectangle. the altitude of the rescue helicopter, represented by ae, is 5000 feet.

The sum of two numbers is 86, and their difference is 20. find the two numbers

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.