Mathematics, 20.09.2020 08:01, econsta3
A crow is flying and carrying a walnut at a height of 25 feet. The crow is ready to drop the walnut to the ground, but a second crow lands directly below him. For the flying crow to be able to dive to the broken walnut before the second crow can steal it, the walnut must hit the ground before the second crow can fly to its landing spot. At the same time, the walnut must fall far enough to break when it lands. The flying crow identifies several different drop spots. There is a 9-foot tall shed with a flat roof which is 15 feet to the right of the second crow. A balcony that is 16 feet high sits 20 feet in front of the second crow. Finally, a flat garage roof that is 21 feet high sits 20 feet behind the second crow. The diagram illustrates the view of the flying crow.
Answers: 2
Mathematics, 21.06.2019 14:30, Rperez6491
The number of revolutions of two pulleys is inversely proportional to their diameters. if a 24-inch diameter pulley making 400 revolutions per minute is belted to an 8-inch diameter pulley, find the number of revolutions per minute of the smaller pulley.
Answers: 1
Mathematics, 21.06.2019 22:00, Jasten
Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.
Answers: 1
A crow is flying and carrying a walnut at a height of 25 feet. The crow is ready to drop the walnut...
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