(Drinking and driving.) Just after Eric had his last drink, the alcohol level in his bloodstream was 0.20 (milligram of alcohol
per milliliter of blood). The alcohol level A(t) in a person follows the exponential decay law. If the legal driving limit for alcohol level is 0.08, how long should Eric wait (after his last drink) before he will legally be able to drive? Let k = 0.47. Give answer in hours to two decimal places.
Well, if we divide 150 by 5 to see how much each individual part is, we get 30. To find out how much Lora got, we need to multiply 30 by 4, which is 120. Altogether, they got 120 plus 150, which is $270.