Awalking trail through a forest preserve is 34,215 meters in length. what is length in kilometers

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

Agreeting card company can produce a box of cards for $7.50. if the initial investment by the company was $50,000, how many boxes of cards must be produced before the average cost per box falls to $10.50?

Find dy/dx using implicit differentiation ln(20+e^xy)=y