1. An Italian restaurant advertises that carryout orders take about 20 minutes. Assume that the time it takes for

an order to be ready follows the exponential distribution with a mean of 20. What is the probability that an order will be ready within 22 minutes? Answer to three decimal places if needed.  CAUTION: with the exponential distribution the parameter in the formula can be the number of events that happen in a given time period or distance or it can represent the average time or distance until the next event occurs. In this example it is a time until the next event. 

2. Suppose you have a random variable that is uniformly distributed between 0 and 2.  What is the probability of observing a random draw greater than or equal to 0.26? Answer to three decimal place if necessary.

3. Suppose you have a random variable that is uniformly distributed between 44 and 71.  What is the variance for this random variable? Answer to one decimal place if necessary.

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