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Question:

This is a tough questionCould someone explain this to me? I have tried but I seem to get the wrong answer?

An aluminum plate is made according to the following dimensionsThe outer radius is 12 inches and the inner radius is 5 inchesUse π 3.14 as an approximate value(a) How many square inches in area is the aluminum plate (the shaded region)? (b) If the cost to construct the plate is $5.50 per square inch, what is the construction cost?

Answer:

The area of a circle is pi times the radius squared Assuming that a 5 radius cutout is made in a 12 radius disc: The entire 12 circular area is pi times 12^2 square inchesThe cutout in the center has an area of pi times 5^2The disk has an area of (pi 144) - (pi 25) or 3.14 119 square inchesThat works out to 374 square inches (rounded to the nearest square inch)At $5.50 per square inch, the cost is $2057.
grilled! Sounds great!
The best Mahi mahi I ever had was simply prepared with olive oil, kosher salt, fresh basil and thyme, fresh black pepper and a few lemon slicesslow roasted in the oven until done light and flakyIt melted in my mouth it was so delicious and a real freshness to itThis would go perfect with risotto or garlic mashed potatoes.
Fish Tacos Ingredients oil (for frying, peanut oil recommended) 1 lb mahi mahi steamed tortilla Beer Batter 3/4 cup flour 1/2 teaspoon baking powder 1/2 teaspoon dried oregano 1/2 teaspoon garlic powder 1/2 teaspoon chili powder 1/4 teaspoon cayenne pepper salt and pepper 1 egg yolk 4-6 ounces beer Sauce 1/2 cup mayonnaise 1 tablespoon cilantro 1/2 lime Condiments lime, for squeezing 2 cups shredded cabbage 1 ripe avocado, sliced Directions 1 Batter: In a medium bowl, mix the flour, baking powder, spices, beer and egg yolkIf the mixture is too thick, add a bit more beer, but don't let it get wateryYou want it thick to coat the fish 2 Cover the batter and refridgerate for at least 3 hoursIt can sit over nightVariation: whip up an egg white and fold it into the batter just before dipping the fish(I've never added the egg white - sounds interesting.) 3 Sauce: If you will be using the sauce for a condiment, combine all the ingredientsUse enough lime juice to make it saucy 4 Fish: Cut the fish into pieces that will fit well into the taco after they are friedI usually cut mine about 1 inch by 1 inch by 3 inches 5 Heat a good 1/2 inch of oil to about 375 degreesOnce the oil is hot, dip the fish into the batter to get it well coated, one piece at a timeDo not put too many pieces into the pan at onceOnly cook a few at a timeWhile the batter is still thick on the fish and dripping, drop it into the oil and fry it about 4-5 minutes, turning to the other side about halfway through 6 To serve: Serve with steamed tortillasYou can serve with the sauce, cabbage, lime and avocado as suggested above (put fish into taco, add avocado, cabbage, top with sauce and a squeeze of lime).

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