If a cigarette contains 25 mg of tar, how many cigarettes must a person smoke to inhale 1.0 pounds of tar?

The answer is = 5.51 exp -5 pounds

Explanation:

1mg is 2.2046e-6 pounds,

Thus 25mg is * 25 *2.2046e-6 = 5.51 exp -5 pounds

So that a person can inhale 1.0 pound of tar must smoke 181488.2033 cigarrettes

Explanation:

⇒ 1.0 pound * ( mg / 2.204 E-6 pounds) = 4537205.082 mg of tar

⇒ # cigarrete = 4537205.082 mg * ( 1 cigarrtte / 25 mg )

⇒ # cigarrete = 181488.2033 cigarrettes