Simplify the radical.
A. 
B. 
C. 
D. 
Answer: D
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Solve the problem. Be sure to make a diagram of the situation with all the given information labeled. ? If a 73.0-foot flagpole casts a shadow 49.0 feet long, what is the angle of elevation of the sun (to the nearest tenth of a degree)? ?
A. 61.1° B. 61.6° C. 58.1° D. 52.5° E. 56.1°
Solve the problem.The rate of change in a person's body temperature, with respect to the dosage of x milligrams of a drug, is given by 
One milligram raises the temperature 3°C. Find the function giving the total temperature change.
A. D(x) = 8 ln 
- 14.6
B. D(x) = ln 
- 14.6
C. D(x) = 8 ln 
+ 3
D. D(x) = ln 
- 3
Use a double-angle identity to evaluate the expression.cos 
A. - 
B. 
C. 
D. - 
Simplify the expression without using a calculator.
A. -823,543
B. - 
C. 
D. 823,543