Solve the problem.For a certain drug, the rate of reaction in appropriate units is given by R'(t) = 
+ 
, where t is measured in hours after the drug is administered. Find the total reaction to the drug from t = 4 to t = 9.
A. 3.22
B. 6.44
C. 6.26
D. 1.9
Answer: D
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Solve the problem.The length of a rectangle is three inches more than the width. The area of the rectangle is 270 inches. Find the width of the rectangle.
A. 8 in. B. 18 in. C. 15 in. D. 9 in.
Determine the coordinates of the indicated point on the graph. 
D
A. (4, -3) B. (3, 5) C. (-3, 4) D. (5, 3)
Solve the problem.The average amount of money spent on laundry soap in 2006 by a family of three was $800. While the average amount of money spent by a family of four was $4000. Find the average rate of change of money spent on laundry soap with respect to family size.
A. $1.60 per person B. $320.00 per person C. $3200.00 per person D. -$3200.00 per person
Use the zero-product property to find all complex solutions of the equation.x4 + 81x2 = 0
A. {0, -9i}
B. 
C. {±9i}
D. {0, ±9i}