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. Round your answer to three decimal places.
?
A. 0.375 units
B. 0.157 units
C. 0.000 units
D. 0.771 units
E. 0.530 units
Answer: B
You might also like to view...
Find the volume of the indicated region.the tetrahedron bounded by the coordinate planes and the plane 
A. 16 B. 24 C. 8 D. 12
For the given data value, find the standard score and the percentile.A data value 2.3 standard deviations below the mean.
A. z = -2.3; percentile = 1.07 B. z = -2.3; percentile = 98.93 C. z = -0.23; percentile = 40.13 D. z = 2.3; percentile = 98.93
Solve the logarithmic equation.log6(6x - 2) = 3
A. 
B. 
C. 
D. 212
Complete the table which corresponds to the given circle graph by listing the percent for each category as well as the number of items in that category.The following circle graph shows the distribution of land for a county containing 93,000 acres.
A. 
B. 
C. 
D. 