What is 64 divide 4+3=

What is the answer to the question 5x+2x

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?

If cos(θ)=2853 with θin q iv, what is sin(θ)?