Multiply.5x ? (-3x3) ? x2
A. -15x6
B. 15x5
C. -8x5
D. -9x6
Answer: A
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Factor out the greatest common factor from the polynomial. Use a positive coefficient on the GCF.w - z
A. 0(w - z) B. 1(w - z) C. 1(w + z) D. w(1 - z)
Simplify the expression. Assume that all variables are positive when they appear.
- 
+ 
A. 12x
- 5
B. 12x
- 5
C. 11x
- 5
D. 12
- 
Find the sum, if it exists.32 + 
+ 
+ 
+ . . .
A. 4
B. 36
C. 
D. Does not exist
Solve the problem. Write the answer in scientific notation.Assume that the volume of the earth is 5 × 1014 cubic meters and the volume of a bacterium is 
cubic meters. If the earth could be filled with bacteria, how many would it contain? Round to one decimal place.
A. 2.0 × 1030 bacteria B. 2.0 × 10-30 bacteria C. 5.0 × 1031 bacteria D. 5.0 × 10-31 bacteria