Find a1, r, an, n, or Sn for the geometric sequence, as instructed.a1 = 1280, r = 
, an = 80; Find n.
A. 3
B. 2
C. 5
D. 4
Answer: A
Mathematics
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Write the number in scientific notation. One milligram is about 0.015430 grain.
A. 0.1543 × 10-1 B. 15.43 × 10-3 C. 1.543 × 10-2 D. 1.543 × 10-3 E. 0.015430 × 10-2
Mathematics
Provide an appropriate response.Solve the equation by factoring: x2 + 4x = 12
A. x = 2, 6 B. x = 2, -6 C. x = -2, -6 D. x = -2, 6
Mathematics
Perform the division. Write the answer with positive exponents.
A. 3x3 + 25x11 - 40x9 + 25x7 + 7x6
B. 15x12 + 5x2 - 8 + 
+ 
C. 3x3 + 5x2 - 8
D. 3x3 + 5x2 - 8 + 
+ 
Mathematics
Provide an appropriate response.Which one of the following has positive slope and negative y-coordinate for its y-intercept?
A. 
B. 
C. 
D. 
Mathematics