Marc can run 2 miles in 16 minutes. at this rate, how long will it take marc to run 5 miles?
a) 8 minutes
b) 30 minutes
c) 40 minutes
d) 50 minutes

On saturday morning, calls arrive at ticketmaster at a rate of 108 calls per hour. what is the probability of fewer than three calls in a randomly chosen minute?

How is this equation completed? i cannot find any examples in the book.

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?