Use the value of the trigonometric function to find 
.
?
?
A. 
B. 
C. 
D. 
E. 
Answer: E
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The half-life of radium is approximately 1,600 years. If the present amount of radium in a certain location is 900 grams, how much will remain after 400 years? Express your answer to the nearest gram.
A. Q = 734 gram B. Q = 768 gram C. Q = 757 gram D. Q = 752 gram E. Q = 744 gram
Solve.The average value of a certain type of automobile was $13,980 in 1992 and depreciated to $5040 in 1996. Let y be the average value of the automobile in the year x, where x = 0 represents 1992. Write a linear equation that relates the average value of the automobile, y, to the year x.
A. y = -2235x - 3900
B. y = -2235x + 13,980
C. y = -2235x + 5040
D. y = - 
x - 5040
Perform the conversion.3 kg = ___ g
A. 300 B. 0.003 C. 0.03 D. 3000
Write the function in terms of its cofunction. Assume that any angle in which an unknown appears is an acute angle.cos 46.7°
A. cos 133.3° B. sin 43.3° C. sec 133.3° D. sin 46.7°