An engineering class is designing model rockets for a competition. The body of the rocket must be cylindrical with a cone-shaped top The cylinder part must be 40 cm tall, and the height of the cone must be twice the radius.
The volume of the payload region must be 1584 cm in order to hold the cargo
a) Find the radius of the rocket. cm
b) Find the height of the cone

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?