Bob and John are 450 feet apart when they start running towards each other. Bob runs at the speed of 11 feet per second, and John runs at a speed of 14 feet per second. How soon will they meet?

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?