What means ratio with explanation

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

Solve for b. ab + c= d b= a + old ob=allc-ch b= (d-c/a

#7. m is the midpoint of pq, the diameter of the circle o is 13in. and rm = 4in. find pm find pq