Determine whether the infinite geometric series converges or diverges. If it converges, find its sum.1 - 
+ 
- 
+ . . .
A. Converges; 
B. Converges; - 
C. Converges; 
D. Diverges
Answer: C
Mathematics
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Simplify the given expression. Expansion of any term is not necessary; proper recognition of the form of the expression leads to the proper result.
A. 6 tan 6x B. 3 tan 6x C. 3 tan 3x D. tan 6x
Mathematics
Expand.(5x + 3)4
A. 1875x4 + 4500 x3 + 1350x2 + 1620x + 81 B. (25x2 + 15x + 9)4 C. 625x4 + 1500x3 + 1350x2 + 540x + 81 D. 625x3 + 1500x2 + 1350x + 540
Mathematics
Perform the indicated operation and simplify. 
+ 
A. 1
B. 
C. 
D. 
Mathematics
Solve the problem.A sample of 1000 g of lead-210 decays to polonium-210 according to the function given by 
where t is time in years. What is the amount of the sample after 70 years? Round the answer to the nearest gram.
A. 29 g B. 77 g C. 106 g D. 9393 g
Mathematics