How many degrees is 1/4 of a circle?

In the diagram of circle a what is m

The following frequency table relates the weekly sales of bicycles at a given store over a 42-week period.value01234567frequency367108521(a) in how many weeks were at least 2 bikes sold? (b) in how many weeks were at least 5 bikes sold? (c) in how many weeks were an even number of bikes sold?

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2