Draw your own diagram to show that 3×6 = (3×4) + (3×2)​

Find the missing dimension extra points

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

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?