Alleged administrative injustice or corrupt practices in the public service​

What is the missing constant term in the perfect square that starts with x^2 -20x

Which of the following scenarios demonstrates an exponential decay

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?