Use the algorithm for euler's method to aproximate the solution : y'=y-t²+1

, in the interval 0<=t<=2. with the condition :y(0)=0.5

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).

The surface area of the triangular prism is .

Ibeg you to me 20. a reaction produces 4.93 l of oxygen, but was supposed to produce 1 mol of oxygen. what is the percent yield?