The diameter of a cylindrical water tank is 10ft, and its height is 9ft. What is the volume of the tank? Use the value 3.14 for π, and round your answer to the nearest whole number. Be sure to include the correct unit in your answer. PLZ answer ASAP PLZ

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics