What is the first step to prove a conjecture by contradiction?

East black horse $0.25 total budget is $555 it'll cost $115 for other supplies about how many flyers do you think we can buy

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 answer is 7.2 how would you put this as money