Find the derivative of the function f(t)=-2t^2+3t-6

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?

What unit of been sure would be appropriate for the volume of a sphere with a radius of 2 meters

There are a total of 75 students in the robotics club and the science club. the science club has 11 more students than the robotics club. how many students are in the science club?