The map of a biking trail is drawn on a coordinate grid the trail starts at p(-7,6 ) and goes to q(4,6) it goes from q to r(4,6) and then to s(6, -6) what is the total length in units of the biking trail

Which of the following are independent events? a) knowing that it is going to rain tomorrow, and bringing an umbrella to schoolb) knowing that you have to get up early tomorrow, and going to bed before 9 p.mc) knowing that it is going to rain tomorrow, and going to bed before 9 p.md) knowing that you have a test in school tomorrow, and studying thw night before