Aand b are two events. p(a)=0.25 , p(b)=0.5 and p(a and b)=0.15 . what is the value of p(a or b) ? 0.15 0.25 0.60 0.90

Find the average speed of a rabbit that runs a distance of 22 m in a time of 1.8 s .

Solve the system of equations y= 3/2 - 1, -x+ y =-3

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective