Mark is a nurse anesthetist. He administers medication that puts people to sleep for surgeries and other invasive medical procedures. For healthy adults, the manufacturer recommends using a dose of 0.4mcg/kg, which means that Mark must give his patients 0.6mcg of medication for each kg they weight. If Mark's patient weights 70kg, how much medication should he administer? A: Let x be the amount of medication Mark should deliver. Write a ratio equation relating this amount to the known quantities. Do not include units in your equation.