Which balance accrues the most interest in a month?
credit card interest rate (apr) balance credit limit
markedup 9.65% $458.90 $1,500.00
cred 8.8% $2,249.80 $2,500.00
bankline 14.9% $946.95 $4,000.00
$946.95
$458.90
$2,249.80
$1,500.00

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?