What are the slope and the y-intercept of the function?

In the diagram below what is the approximate length of the minor arc ab

What statement is true? 2x^2-9x+2=-1

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?