Solve the problem.For a certain drug, the rate of reaction in appropriate units is given by 
where t is measured in hours after the drug is administered. Find the total reaction to the drug from 
to 
A. 5.17
B. 11.35
C. 9.96
D. 4.98
Answer: A
Mathematics
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Rationalize the denominator and simplify. Assume that variables represent positive values.
A. 
(
+ 1)
B. 
(
+ 1)
C. 
(
- 1)
D. 
(
+ 1)
Mathematics
Plot the point.(-4, 225°)
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.A formula for calculating the distance, d, that can be seen from an airplane to the horizon is 
where x is the altitude of the plane in feet. Find d when the altitude is 15,441 feet. Round your answer to the nearest hundredth.
A. 9419.01 feet B. 151.6 feet C. 125.48 feet D. 251.6 feet
Mathematics
Express the sum using summation notation. Use a lower limit of summation, not necessarily 1, and k for the index of summation.(a + 1) + (a + b) + (a + b2) + . . . + (a + bn)
A. 
B. 
C. 
D. 
Mathematics