This cylinder has a volume of 12π cubic inches and a diameter of 4 inches. Find the cylinder's radius and height i don't understand how to do this? please help if can?

The survey of study habits and attitudes (ssha) is a psychological test that measures the motivation, attitude toward school, and study habits of students, scores range from 0 to 200. the mean score for u. s. college students is about 115, and the standard deviation is about 30. a teacher who suspects that older students have better attitudes toward school gives the ssha to 55 students who are at least 30 years of age. the mean score is 113.2. assume the population standard deviation is 30 for older students what is the margin of error for a 95% confidence interval for the population mean score for a. older students? b. compute the 95% confidence interval for the population mean score for older students. c. compute the 99% confidence interval for the population mean score for older students. d. compute the 88% confidence interval for the population mean score for older students.

The length of a lap is 15 meters. if lisa wants to swim 450 meters this week, how many laps must she swim

The two cones below are similar. what is the height of the smaller cone?