Question

The standard dose of an antibiotic is 4 cc (cubic centimeters) for every 25 pounds of body weight. At this rate, what is the standard dose for a 140 pound woman?

Answer 1

For this case we can make the following rule of three:
 4 cc ----------------> 25
 x --------------------> 140
 Clearing the value of x we have:
 x = (140/25) * (4)
 x = 22.4 cc
 Answer:
 the standard dose for a 140 pound woman is:
 x = 22.4 cc