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Earn +20 ptsQ: What is 2 to the 21 power?
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What is 2 to the 21st power?
2^21=2,097,152
What is 2 to 7th power raised to the third power?
(27)3 = (2)21 = 2,097,152
What does 2 to the half power equal?
21/2 = √2 ≈ 1.414 The rules of indices are that when multiplying add them. 21/2 x 21/2 = 21/2 + 1/2 = 21 = 2 So multiplying 21/2 by itself gives 2. But what number multiplied by itself gives 2? The answer is the square root of 2. Thus 21/2 is the square root of 2.
F to the second power plus 4 equals 5 to the second power What is F?
^ means "to the power of" F ^ 2 + 4 = 5 ^ 2 F ^2 +4 = 25 F ^2+4 -4 = 25 -4 F^2 = 21 F = (square root of 21)
What the value of 2 to the power of -1?
3
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