If a doctor prescribes 75 milligrams of a specific drug to her patient, how many milligrams of the drug will remain in the patient's bloodstream after 6 hours, if the drug decays at a rate of
20 percent per hour? Use the function A(t) = le^rt and round the solution to the nearest
hundredth

Dropping less than two inches per mile after emerging from the mountains, a river drains into the ocean. one day's discharge at its mouth, 5.6 trillion gallons, could supply all of country a's households for seven months. based on this statement, determine how much water an average household uses each month. assume that there are 100 million households in country a. country a uses approximately nothing gallons per household per month.

Can you simplify 4/7? 24 points will be awarded!

Agrain trader buys the following amounts from three suppliers: 3,200 pounds, 5,100 pounds and 700 pounds. what is the total weight of his purchase?