58. The half-life of ibuprofen (also known as Advil) is 2hours. Imagine that you took 500 milligrams of ibuprofen because ofback pain. Now imagine that your back pain will return when theamount of ibuprofen in your body is less than 100 milligrams.Assuming that the ibuprofen relieves pain immediately afteringestion, when will you begin to feel back pain again?

63. There are approximately28.3 grams per ounce. According to the United States Food &Drug Administration, the recommended daily requirement of proteinis 44g for adult women. How many ounces of protein isthis?