- How can you solve this with nodal analysis?

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How many different 4-digit numbers can be formed using the digits 2, 4, 5, 6, and 7 so that no digits repeat & the number is divisible by 4? Find the exact value of the expression: sin(sin^-1 2/3 + cos^-1 1/3)? How can lycopodium powder be used in various science experiments? Which is the correct simplified form of this expression? If you determine the age of a rock by looking at the fossils in the rock layer, which law have you used?