The biological half-life of the asthma medication theophylline is 4.5 hours for smokers. Find the amount of the drug retained in a smoker's system 12 hours after a dose of 1 unit is taken.
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Please enter your answer as a number without the units, rounded to three decimal places.
Fill in the blank(s) with the appropriate word(s).
0.157
Mathematics
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Use the change-of-base formula to find the logarithm. Round your answer to four decimal places. log200 40
A. 0.6962 B. 5.2983 C. 1.4363 D. 3.6889
Mathematics
Add or subtract as indicated. Simplify the result, if possible.
- 
A. - 
B. - 
C. 
D. 
Mathematics
Find the value of the determinant.
A. 34 B. -1 C. -31 D. 1
Mathematics
Perform the indicated operations and simplify the result. Leave the answer in factored form.
+ 
A. 
B. 
C. 
D. 
Mathematics