A Ground beef should be used within two days of purchase. Be sure to check the use by information on the package label before purchase. You can store ground beef safely in your refrigerator at 35 to 40 degrees, for one to two days. If you can't use it within that time, freeze it.
Quick loaf pans. Most quick loaf recipes (banana bread, zucchini bread) are written for 9 x 5 x 2 3/4-inch pans, a traditionally shaped loaf pan that's just slightly larger than a yeast bread loaf pan. Caveat emptor: Using a yeast loaf pan for a quick bread recipe may result in batter overflowing the pan. Likewise, using a quick bread pan for a yeast loaf recipe may result in a loaf that doesn't dome. These pans, though similar in size and shape, are not interchangeable. Quick loaves also can be baked in a longer, narrower pan (about 12 x 4 x 2 1/2 inches).
The rectangular pan that most home bakers are familiar with (and that 1 box of Duncan Hines, Betty Crocker or Pillsbury cake mix will make one of) is the quarter sheet pan, which measures 13x9, with a depth of either 2 or 3 inches. If you laid 4 of these pans together, this would be approx. the size of a full sheet. Hopefully the chart below will answer your other questions. Pan name measurement # of 2-inch 2-inch party servings. Quarter sheet 13-inches x 9-inches 20. Half sheet 12-inches x 18-inches 40. 3/4 sheet 18-inches x 18-inches 60. Full sheet 18-inches x 30-inches 80. Hope this helps.