Solve.10n - 4 = 66
A. n = 60
B. n = 7
C. n = 10
D. n = 64
Answer: B
Mathematics
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An isotope of thorium, 227Th, has a half-life of 18.4 days. How long will it take 75% of the sample to decompose (in days)? ? Please enter your answer as a number without the units, rounded to the nearest tenth.
Fill in the blank(s) with the appropriate word(s).
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Determine if the graph of the function is concave up or concave down.y = - 
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Mathematics
Find the product.(9x + 11)(5x + 4)
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Mathematics