A new car is purchased for \$26,000$26,000 and over time its value depreciates by one half every 5 years. How long, to the nearest tenth of a year, would it take for the value of the car to be \$2,300$2,300?

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?