Problem: Article: Set the shark pieces in the bag, then top them with a few lemon slices. Store the pieces, giving them plenty of time to absorb the lemon juice. The shark's age when it is caught can affect how it tastes. Older sharks tend to have a gamey flavor. Lemons help neutralize the unpleasant flavor and prepare the meat for searing. Pour about 2UStbsp (30mL) of olive oil in the pan, then add 2 tablespoons (28.4 g) of butter. Allow the butter to melt. Continue heating the pan until the oil shimmers and slides easily around the pan. Baking the shark in the oven is also possible. Preheat the oven to 400F (204C), then cook the shark between 10 to 12 minutes. To fry the shark, coat it in flour, then cook it in vegetable oil or shortening. Lay the shark pieces out on a flat surface, then rub a spice mix over each side. A Cajun spice mix is an example of the flavors you can aim for. Add about 1 tablespoon (8.0 g) of the mix to each side of the meat. Also add 2 chopped up cloves of garlic. To make a Cajun spice mix at home, combine salt, pepper, garlic powder, paprika, cayenne pepper, oregano, thyme, and red pepper flakes. Fit the shark pieces into the pan and wait for them to turn white and then a little brown on the bottom. Turn the pieces over with a spatula. When they are done cooking, they will look white and flakey. Set them aside on a plate when they're done. Test the shark with a knife or fork. In particular, pay attention to the center of each piece. Make sure it is cooked all the way through. The cooking time may vary depending on your oven and the heat setting you chose. Pour about 14c (59mL) of either liquid into the pan. Stir the liquid in the pan to mix in any of the juice and meat left over from the shark. Continue cooking the liquid until it thickens into a nice sauce you can pour over the shark steaks. Another option is to melt 1 tablespoon (14.2 g) of butter with 1c (240mL) of spiced rum and the juice from 1 lime. If the shark hasn't finished cooking yet, you can add the liquids while it is still in the pan. After serving the shark, move the leftovers into resealable plastic bags or containers. Label the containers as needed. Throw away any remaining pieces once they look rancid or begin emitting a sour odor. You can store pan-fried shark for up to 3 months in the freezer.
Summary: Refrigerate the shark in a bag with lemon slices for 30 minutes. Heat olive oil and butter in a pan over medium-high heat. Season the meat with salt, pepper, and spices. Cook the steaks about 6 minutes per side. Cook white wine or broth in the pan for 3 to 5 minutes. Store the leftovers for up to 4 days in the refrigerator.

Problem: Article: Sketch a trapezoid with the following measurements: left side of height b, right side of height a, and base of length a+b. Simply connect the tops of the left and right sides to complete the trapezoid. Divide the base of the triangle into lengths a and b so that two right triangles of lengths a, b, and c is formed. The third triangle will have two sides of length c and a hypotenuse of length d. The two smaller triangles are congruent (identical). The area of a trapezoid is: A = (b1 + b2)h where b1 is one straight side of the trapezoid, b2 is the other straight side of the trapezoid, and h is the height of the trapezoid. For this trapezoid: b1 is a, b2 is b, and h is a+b. The area of this trapezoid is A = (a +b)(a+b) . Expanding the binomial yields: A = (a2 + 2ab + b2). The area of a right triangle is: A = bh where b is the base of the triangle and h is the height. This trapezoid has been broken into three different triangles; therefore, the areas need to be added together. First, find the area of each one and then add all three together. Because two of the triangles are identical, you can simply multiply the area of the first triangle by two: 2A1 = 2(bh) = 2(ab) = ab. The area of the third triangle is A2 = bh = c*c = c2. The total area of the trapezoid is A1 + A2 = ab + c2. Because both of these calculations are equal to the total area of the trapezoid, you can set them equal to each other. Once they're set equal to each other, you can reduce the equation to its simplest form. (a2 + 2ab + b2) = ab + c2. Multiply both sides by 2 to get rid of the : (a2 + 2ab + b2) = 2ab + c2. Subtract out the 2ab: a2 + b2 = c2. You're left with the proof: a2 + b2 = c2.
Summary: Draw a trapezoid with base a+b and sides a and b. Divide the trapezoid into three right triangles, two of which are congruent. Calculate the area of the trapezoid using the area formula. Find the area by summing the areas of the three triangles. Set the different area calculations equal to each other.

Problem: Article: Algae spores transfer to your birdbath from objects that fall out of nearby trees and will grow at a faster rate when exposed to direct sunlight. To prevent the build up of algae, it's best to store your bird bath in a shaded area of your hard. You should also keep the bird bath away from shrubs and bird feeders to prevent contamination. This will help keep the water fresh and prevent algae growth from spreading within the birdbath. If you have the time to do so, add fresh water every day. Remove any visible algae when changing water in your birdbath. Pumps, drippers, and heaters that run on solar power or electric batteries are a good idea for a birdbath. Running water is less likely to become contaminated with algae. If your birdbath is not already equipped with such a device, purchase one at a local hardware store and follow package instructions for set up.
Summary:
Keep the bird bath in shade. Change the water daily. Use running water, if possible.