John spent about 12.5 hours at a water park. He estimated he spent about 30% of the time waiting in line. What would be a reasonable amount of time he spent in line.

1. if events a and b are non-overlapping events, how do you find the probability that one or the other occurs? 2. what does it mean if p(a or b) equals 1?

The graph represents f(x)=[x]+3. what is f(-2.2)?

The length of time it takes to find a parking space at 9 a. m. follows a normal distribution with a mean of 5 minutes and a standard deviation of 2 minutes. find the probability that it takes at least 8 minutes to find a parking space. (round your answer to four decimal places.)