Find the exact values of sinθ/2 and cosθ/2 for sinθ 11/19. on the interval 0° ≤ θ ≤ 90°. Heres the options

What is the missing step in this proof ?

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?

Which of the following represents a function? 50 !