Solve the problem.The formula D = 8e-0.04h can be used to find the number of milligrams D of a certain drug in a patient's bloodstream h hours after the drug has been given. When the number of milligrams reaches 3, the drug is to be given again. What is the time between injections?
A. 24.52 hrs
B. 27.47 hrs
C. 25.97 hrs
D. 51.99 hrs
Answer: A
Mathematics
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Perform the indicated operation. Simplify, if possible.
+ 
- 
A. 
B. 
C. 
D. 
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A set of data items is normally distributed with a mean of 500. Find the data item in this distribution that corresponds to the given z-score.z = 1.5, if the standard deviation is 10.
A. 550 B. 505 C. 510 D. 515
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Perform the operations indicated. Write your answer in simplest form.-3 + (-18)
A. -21 B. -15 C. 15 D. 21
Mathematics
Find the exact value under the given conditions.sin ? = 
, 
< ? < ?; cos ? = 
, 0 < ? < 
Find sin (? - ?).
A. - 
B. 
C. 
D. 
Mathematics