- How many digits are required to number the pages of a book having 100 pages.?

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What is the reflectivity (in percent) needed to keep water at a temperature near its freezing point of 256 K for a planet at 1 AU? Are all acids electrolytes? Why? .26 percent of 54? Let f(x) = 4x^3 -3x -1. An equation of the line tangent to y = f(x) at x = 2 is {hint: need to find the derivative of f} A. y=25x-5? Trying to make a solution given final concentrations and need to know what volumes to use For example: .6M HCl
2mM Tris-EDTA
15 mM MgCl2?