Joe plans to buy a pair of golf shoes. the original price of the pair joe wants is $75, but they are now on sale for 20% off. what is the sale price of the golf shoes? a. $1.50 b. $15.00 c. $73.50 d. $60.00

Solve for x where 0 equation: cot^2x+2cotx+1=0

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?

Me i’m stuck on all these questions besides the two bottom ones