Find the instantaneous rate of change of the volume v=(1/3)*3.1415r^2h of a cone with respect to the radius r at r=a if the height h does not change

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

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83

Which shows how to solve the equation 3/4x=6 for x in one step?