At the start of the month, the value of an investment was 48.45. by the end of the month the value of the investment changed by a loss of 13.80

How can you construct perpendicular lines and prove theorems about perpendicular lines

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?

The sum of four times a number and three is two times the number minus twenty nine