How do you calculate plasticizing rate?

Why is it important to know the area of a circle? Can you solve for a variable in an equation? If f(x) cos(2x).cos(4x).cos(6x).cos(8x).cos(10x) then find the limit of 1 - f(x)35(sinx)2 as x tends to 0 (zero).? How many main jet sizes should you go up on your 1000 t cat with d and d pipes? How do you feel after a sex? What the derivetive of x2? If g-1(x) is the inverse of g(x) what is the value of g-1(g(x))? Which best explains the difference between a fixed currency and floating currency? How does the formula -b over 2a work? How do you find out if the function is a even odd or neither I know your supposed to use f-x -fx but I am not so sure how to do it the problem is 2x to the third power minus x squared? What is your future? What are the intercepts of -3x plus 5y- 2z 60? If Cathy put 6 pairs of black gloves and 6 pairs of brown gloves in her drawer in complete darkness how many gloves must she take out to get a pair? How do you draw the graph of modulus of y equals cot x? What is a logistic function or curve? What is meaning of futile? What happens to the value of y as x increases in the function y equals 2x-5? What is 161 divided by 7? What is x divided by x squared? Is calculus harder than physics?