Solve the problem.The formula D = 8e-0.6hcan be used to find the number of milligrams D of a certain drug that is in a patient's bloodstream h hours after the drug has been administered. The drug is to be administered again when the amount in the bloodstream reaches 4 milligrams. What is the time between injections?
Fill in the blank(s) with the appropriate word(s).
about 1.2 hours
Mathematics
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Multiply in the indicated base.637 × 67
A. 5357 B. 5447 C. 5347 D. 6347
Mathematics
Graph the function.f(x) = 5(x + 2) + 1.
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Find the volume V of a right circular cylinder with radius 19 cm and height 20 cm. Express the answer in terms of ?.
A. V = 380? cm3 B. V = 190? cm3 C. V = 7220? cm3 D. V = 1805? cm3
Mathematics
Determine whether the given quadratic function has a minimum value or maximum value. Then find the coordinates of the minimum or maximum point.f(x) = -4x2 + 4x
A. minimum; 
B. minimum; 
C. maximum; 
D. maximum; 
Mathematics