The mean annual incomes of aircraft mechanics are normally distributed with the mean of $40,000 and a standard deviation of $2,000. A local union representative wishes to find out whether their members earn more or less than $40,000 annually. If the level of significance is 0.05 and σ is known, what is/are the critical value(s) for a 2-tail test?

How many glue sticks are in a basket containing 96 scissors, if the ratio of glue sticks to scissors is 19 to 57.

Which of the following graphs could represent a quartic function?

With these 5 geometry questions! pls 1.)quadrilateral abcd is inscribed in this circle.what is the measure of ∠a ? enter your answer in the box.°2.)quadrilateral abcd is inscribed in a circle.what is the measure of angle a? enter your answer in the box.m∠a= 3.)quadrilateral abcd is inscribed in this circle.what is the measure of angle b? enter your answer in the box.m∠b= °4.)quadrilateral abcd is inscribed in this circle.what is the measure of angle a? enter your answer in the box.°5.) quadrilateral abcd is inscribed in this circle.what is the measure of angle c? enter your answer in the box.°