- Four times a number decreased by 25 is 13 less than 6 times the number. Find the number.?

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Is this true ?
http://www.newsweek.com/how-will-world-end-another-doomsday-looms-here-what-could-actually-bring-714437? Calculate the acceleration of gravity 277 km above Earth's surface in terms of g (mass of Earth is 5.97 1024 kg, and the radius is 6380 km)? 1. Describe the shape of your distribution.
2. Calculate the mean, median, and mode.
3. Calculate the standard deviation.? Not sure how to find the derivative? Could someone come up with a rhyming poem about the chemistry terms. Has to use 10 terms and has to be 20 lines. if you can help BLESS YOU!?