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)?
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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).
36.8
Mathematics
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Match the system of equations with one of the graphs.xy = 25x + y = 10
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Mathematics
Solve the problem.Suppose that you roll a pair of honest dice. If you roll a total of 6, you win $18; if you roll a total of 11, you win $72; if you roll any other total, you lose $9. Let X denote the payoff in a single play of this game. Find the expected value of a play of this game. Round your answer to the nearest penny.
A. $0.75 B. $-0.75 C. $-0.50 D. $-1.00 E. $0
Mathematics
Express the sum or difference as a product.sin 75?+ sin 15?
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B. - 
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Mathematics
Graph the linear equation.y = 5x - 2
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B. 
C. 
D. 
Mathematics