Goldfish will eat from their owners’ hands after getting used to their aquarium for a few weeks. This behavior enables you to teach them tricks, using food as a reward.  Feed goldfish different kinds of foods. Goldfish like freeze dried food, pellets, flakes, or fresh or frozen vegetables.  Be careful not to overfeed your fish. This can result in a disorder known as swim bladder. The goldfish becomes bloated and floats at the top of the water. The solution is to withhold food for two days or feed it only cooked beans or peas. You can train your goldfish to do specific things like go through hoops. In fact, just as you do with a puppy, you can train your goldfish to do these things by using a treat system. Show them what you want them to do, then give them a reward. A training kit may provide a hollow stick you can place food in to deliver the treat more quickly.  Show them what you want them to do by leading them through a trick with food, either with the feeding stick or your fingers. For example, if you have a hoop set up in the water, hold the food on the opposite side of the hoop from where the goldfish is located. Let them eat the food after they have swum through the hoop. Repeat this training routine with any action you wish your goldfish to make. A feeding might make it easier to encourage a goldfish to do particular things. This is because such a stick allows the food to stay under water and doesn’t get in the goldfish’s way. To make your own feeding stick for training, try using food stuck to the end of a skewer. If you don’t have a feeding stick, place goldfish food on top of the water. If your goldfish will eat from your fingers, you can deliver the reward snack this way as well.
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One-sentence summary -- Feed them from your hand. Use food to encourage particular behaviors. Use a feeding stick.

Q: R is the rate of growth (the annual interest rate), and T is the time (in years) it takes for the amount of money to double. For example, how long does it take to turn $100 into $200 at a yearly interest rate of 5%? Letting R = 5, we get 5 x T = 72. In this example, divide both sides of the above equation by R (that is, 5) to get T = 72 ÷ 5 = 14.4. So it takes 14.4 years for $100 to double at an interest rate of 5% per annum. (The initial amount of money doesn't matter. It will take the same amount of time to double no matter what the beginning amount is.) How long does it take to double an amount of money at a rate of 10% per annum? 10 x T = 72. Divide both sides of the equation by 10, so that T = 7.2 years. How long does it take to turn $100 into $1600 at a rate of 7.2% per annum? Recognize that 100 must double four times to reach 1600 ($100 → $200, $200 → $400, $400 → $800, $800 → $1600). For each doubling, 7.2 x T = 72, so T = 10. So, as each doubling takes ten years, the total time required (to change $100 into $1,600) is 40 years.
A: Let R x T = 72. Insert a value for R. Solve for the unknown variable. Study these additional examples:

Article: This can be done with or without flouring or breading it first, but pan-frying is a first step to many rabbit recipes. It, of course, can be eaten at this point without further preparation, especially if you're hungry; and if the meat is too gamey, you may want to find out now before putting it into a stew. For example, pan-fry the rabbit in some wine, then some water. Let it cook for 45 minutes, adding the water gradually over the cooking time. Just be sure that it never runs out of water or it may burn. When done, turn off the heat and cover the rabbit pieces with lemon tree leaves (5-10 leaves). Leave the rabbit covered in lemon leaves with the pot closed, for 5-10 minutes, so that the aroma of the lemon gets into the meat. Then remove the leaves (they are not edible). Delicious!
Question: What is a summary of what this article is about?
Chop the rabbit into pieces for easier cooking. Pan-fry the meat. At this point, if there's anything left, de-bone the rabbit and prepare it according to your favorite recipe.

Article: Stand with your back straight and your feet hip-width apart. Bend your knees at a 90° angle and push your hips back. Do not let your knees go past your toes. Keep your knees aligned above the middle of your foot. Straighten your knees to return to your starting position.  Keep your hands on your hips. The motion is similar to sitting down in a chair. 1 repetition is 1 squat. Stand up straight with your feet together and raise your arms out in front of you. Bend your knees at a right angle and squat down as far as is comfortable before returning to your original position.  Keep your knees and hands together while you squat. 1 squat is 1 repetition. Stand up straight with your arms by your sides and your feet together. Lower yourself into a squat position with your knees at right angles to the floor and your arms stretched out in front of you. Your feet should be shoulder-width apart. Then, jump back up to the standing position. 1 squat is 1 repetition. Start with your feet flat on the ground, slightly wider apart than your shoulders, and your toes at a 45° angle. Place your hands on your hips. Bend your knees into a wide-leg squat, squeeze your butt, and raise your heels from the floor. Gradually bring your heels to the ground and straighten your knees again.  Aim to bend your knees far enough to create a right-angle with your calves and thighs. This requires a lot of balance, so you might want to start by holding onto a wall. This movement is 1 repetition. Place your feet together and squat at a 90° angle. Keep squatting as you jump and land with your feet shoulder-width apart. Then jump back into your starting position. Stay squatting for the whole time.  You can hold a dumbbell or weight horizontally in front of your chest once you have perfected the jump squat. Hold the dumbbell or weight close to your body with both hands so that it will not injure your wrists, elbows, or shoulder joints. 1 low jump squat is 1 repetition.
Question: What is a summary of what this article is about?
Learn proper squatting technique. Perform narrow squats for a simple glute and quad workout. Try drop squats for a quick glute and hamstring workout. Do tip toe plié squats for an equipment-free glute exercise. Try low jump squats for a weighted challenge.