Find the exact acute angle ? for the given function value.sin ? = 
A. 30°
B. 45°
C. 60°
Answer: C
Mathematics
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Graph the function.f(x) = 2 ln x
A. 
B. 
C. 
D. 
Mathematics
Provide an appropriate response.The roots of 
- x = 7 are
A. -4 only B. -4 and -9 only C. -4 and 9 only D. 4 only E. -9 only
Mathematics
Find the annual straight-line rate of depreciation for the estimated life.6 years
A. 16.7% B. 1.7% C. 8.3% D. 6%
Mathematics
Solve the problem.The amount of a certain radioactive isotope present at time t is given by 
grams, where t is the time in years that the isotope decays. The initial amount present is 400 grams. How many grams remain after 20 years? Round to the nearest hundredth.
A. 379.25 g B. 397.87 g C. 234.78 g D. 681.48 g
Mathematics