Solve the problem.The pH of a chemical solution is given by the formula pH = -log10[H+], where [H+] is the concentration of hydrogen ions in moles per liter. Find the pH if [H+] = 4.2 × 10-14. Round to the nearest hundredth.
A. 13.38
B. 14.38
C. 14.62
D. 13.62
Answer: A
Mathematics
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Compute dy/dx for the function.y = sinh 11x
A. 11 cosh 11x
B. 11 cosh 10x
C. 11 sinh 11x
D. 
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Multiply. Write the answer in lowest terms.
? 
? 
A. 
B. 
C. 
D. 
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Solve the problem.The area of a parallelogram is 25x3 + 60x2 + 40x + 7. Find a polynomial that expresses the height if the base is 5x + 7.
A. 5x2 + 5x + 7 B. 5x2 + 10x + 1 C. 5x2 + 5x + 1 D. 10x2 + 5x + 1
Mathematics
How many gallons of washer fluid that is 13.5% antifreeze must a manufacturer add to 500 gallons of washer fluid that is 11% antifreeze to yield washer fluid that is 13% antifreeze? ?
A. 1,000 B. 1,740 C. 1,730 D. 2,000 E. 1,790
Mathematics