Write the number without exponents.8.31 × 10-4
A. 0.00831
B. -831,000
C. 0.000831
D. 0.0000831
Answer: C
Mathematics
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Solve.Erika spent 
hr on her computer visiting the history channel and the discovery channel websites. She spent 
hr at the history channel website. How many hours did she spend at the discovery channel website?
A. 
hr
B. 
hr
C. 
hr
D. 
hr
Mathematics
Solve the equation.x(x2 + 5) = 3 + x3
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.The profit, in dollars, from the sale of x compact disc players is 
Find the marginal profit when x = 10 .
A. $590 B. $210 C. $204 D. $596
Mathematics
Find the axis of symmetry associated with the quadratic equation.y = x2 - 12x + 39
A. x = 6 B. x = 0 C. x = -6 D. x = 3
Mathematics