Please help me answer this question

The time it takes, in hours, for tickets to be sold out for an AC/DC concert follows The density curve for a continuous random variable X has which of the following a uniform continuous distribution with a = 0.6 and b = 5.2. (Round your answers to properties? four decimal places.) O The probability of any event is the area under the density curve and above (a) What is the probability that it takes less than 2.4 hours for tickets to sell out? the values of X that make up the event. Answer: #13 O P(X = c) = 0, where c is a constant. #14 (b) What is the probability that it takes between 3.8 and 4.9 hours for tickets to O Density curves are only positive. sell out? O The total area under the density curve for X must be exactly 1. Answer: O All of these answers are correct. Suppose that a Normal model described student scores in a history class. Parker has a standardized score (z-score) of -1.09. What does this mean for Parker? At the local liquor store, a single purchase approximately follows a normal O Parker has a score that is 1.09 times the average for the class. distribution with a mean of $82 and a standard deviation of $19.4. Using the Empirical Rule, what values represent the range of the middle 99.7% of the O Parker is 1.09 points above average for the class. distribution? (Round your answer to 2 decimal places if necessary) O Parker is 1.09 points below average for the class. #15 O Parker has a standard deviation of 1.09. #16 O Parker is 1.09 standard deviations below average for the class