Which of the following is an example of two sets?

Let f(x) = x4- 8x2 . find the relativeextrema of this function using the second derivative test.

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?