Consider a situation where p(a) = 4/5 and p(a and b) = 1/2. if the events are independent, then what is p(b)?

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?

See attachment below and find the equivalent of tan(∠qsr)

Given the diagram below, michael writes, "segment ac is congruent to segment ac." which of the following reasons allow him to write this statement?