The length of the major axis of the ellipse below is 12. what is the sum of the lengths of the red and blue line segments

What is the slope of the line shown below?

Factor the polynomial. b^2 + 4b + 4

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?