Acylindrical barrel has a height of 8 feet and a diameter of 6 feet. what is the volume of the barrel?

Can someone pls ! pls answer all. no explanation needed..

When y’all answer can y’all explain too !

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.