Find the first term and the common difference of the arithmetic sequence described. give a recursive formula for the sequence. find a formula for the n^th term

5th term is 0;
50 term is - 135

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 distance between two points is 6.5cm and scale of map is 1: 1000 what's the distance between the two points

Events a and b are independent. the probability of a occurring is 2/5. the probability of b occurring is 1/4. what is p(a and b)?