Posts Tagged ‘paths’
The FCC comes across many smartphones in its daily routine, but it’s hardly an everyday occurrence for one of those handsets to rock a miniature projector. That’s the claim to fame of the Samsung Galaxy Beam, which just made its way through the regulatory body with full 3G support for AT&T’s 1900MHz and 850MHz bands. We were first introduced to this updated version of the original Galaxy Beam at Mobile World Congress, and for a quick refresher, the Android 2.3 device packs a dual-core 1GHz CPU, 768MB of RAM, a 4-inch WVGA display and a projector that’ll toss 50-inch imagery onto the wall. Naturally, whether AT&T chooses to sell the smartphone is another consideration entirely, but this certification will keep users in proper standing with the feds, and that’s a good thing.
If you’ve ever looked up in the sky and wondered where a plane might be headed, Wolfram Alpha might just know the answer. The search engine, which recently began incorporating data from the FAA can now, with a five-minute delay from real-time data, use a flight’s speed, heading and altitude to offer a projection of a plane’s position. A search for ‘flights overhead’ via the Wolfram Alpha web site or app will use your location to pinpoint flights that should be visible to you. That string currently only works if the flight has at least one endpoint in the United States, so tracking international flights might be limited. Even so, this should allow you to look up flight delays, check when the next flight will be, see a cool interactive sky map and track a specific flight, of course. You’ll have no valid excuse for being late to pick a friend up from the airport ever again.
There is a 10 x 10 grid. I’ll indicate the intersection of grid lines, considering the bottom-left one to be (0, 0) and the top-right to be (10, 10). A robot takes either a vertical line up or horixontal line right each second to reach the top-right in 20 moves. However the point (4, 5) is forbidden. The robot gets the electric chair it it gets to this point.
How many different paths exist if the robot has to come through without getting the chair?
Please come up with a valid explanation for your answer.