In a random sample of 20 people, the mean commute time to work was 33.5 minutes and the standard deviation was
7.2 minutes. assume the population is normally distributed and use a t-distribution to construct a 80% confidence interval for the population mean

Tickets to a science exposition cost $5.75 each for studentd and $7.00 for adults.how many students and adults went if the ticket charge was $42.75

What is the t intercept of the line given by the equation below y= -10x + 14

Need to finish my juan wants to build a greenhouse in his back yard. he needs to maximize the ratio of floor area to structure volume in order to provide the most room for plants while minimizing the area to be heated. find the description of the structure that best meets juan’s criteria. a.) a hemisphere with a diameter of 12 feet b.) a cube with a side length of 12 feet c.) a cone with a diameter of 12 feet and a height of 10 feet d.) a square pyramid with a base side length of 12 feet and a height of 9 feet