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. 27.47 hr
B. 51.99 hr
C. 27.36 hr
D. 24.52 hr
Answer: D
Mathematics
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Solve the problem, using 3.14 for ?. Round to nearest tenth unless instructed differently.A semicircular driveway has a diameter of 100 ft. How long is the driveway?
A. 314 ft B. 157 ft C. 155 ft D. 1666.7 ft
Mathematics
Find the exact length of the line segment shown int he figure. Approximate this length to two decimal places when appropriate.
A. 25
B. 5
C. 
? 2.65
D. 
? 2.24
Mathematics
Find the sum.5.8 + (-20.1)
A. -14.3 B. 25.9 C. 14.3 D. -25.9
Mathematics
Solve.Three times the square of the difference between a number and 5 is -75. Find the number(s).
A. 5 + 5i
and 5 - 5i
B. 5 + 5i and 5 - 5i
C. -5 + 5i and -5 - 5i
D. 5i + 5 and 5i - 5
Mathematics