Use 800+400+200+100+50+25+12.5=1587.5 to write the sigma notation that matches this setup

Use the graph of the sine function y=2sinθ shown below

What is the ratio for the surface areas of the cones shown below, given that they are similar and that the ratio of their radil and altitudes is 4: 3? 23

The base of a triangle is 8 1 3 meters and the height of the triangle is the fourth root of 16 meters meters. what is the area of the triangle?