can someone please help me??

21. A machine is used to fill a bag with 4 pounds of granulated sugar. After the bags are filled, another machine weighs them. If the bag weighs 0.3 ounces more or less than the desired weight, the bag is rejected. What is the heaviest and lightest bag the machine will approve? Leave answer in ounces. (1 pound = 16 ounces) Read the following situations. Then answer the question. Define your variable. Show your work. 15. How long does it take for a ball to hit the ground when it is dropped from a roof that is 25 feet above the ground? Use the formula f(t) = -16t + ho, where he is the initial height, f(t) is the final height, and t is the time in seconds