Evaluate the integral.
?
?
A. 
B. 
C. 
D. 
E. 
Answer: B
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Solve.A certain store has a fax machine available for use by its customers. The store charges $2.10 to send the first page and $0.60 for each subsequent page. Use an inequality to find the maximum number of pages that can be faxed for $6.90
A. at most 50 pages B. at most 9 pages C. at most 3 pages D. at most 12 pages
Multiply.8x(5x + 10)
A. 5x2 + 80x B. 40x2 + 80x C. 40x2 + 10x D. 120x2
Solve the problem.The pH of a solution ranges from 0 to 14. An acid has a pH less than 7. Pure water is neutral and has a pH of 7. The pH of a solution is given by 
where x represents the concentration of the hydrogen ions in the solution in moles per liter. Find the hydrogen ion concentration if the 
A. 1012 B. 10-12 C. 0.08 D. 2.48
Evaluate the exponential expression.2.53
A. 1.5625 B. 15.625 C. 156.25 D. 7.5