Solve the problem.In chemistry, the pH of a substance can be determined using the formula pH = -log [H+], where [H+] represents the hydrogen ion concentration. Determine the pH of the solution which has a hydrogen concentration of 4.1 × 10-11. Round to the nearest tenth.

A. -11.6
B. 11.6
C. 10.7
D. 10.4


Answer: D

Mathematics

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Perform the indicated operations.

A. -  
B.
C.
D. - 

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Graph the circle.x2 + y2 + 2x + 6y - 6 = 0

A.

B.

C.

D.

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Provide an appropriate response. A right circular cylinder has a diameter of 8 ft. and a height of 10 ft. If 1 ft. = 0.305 m, what is the volume in cubic meters?

A. 503 cubic meters B. 57 cubic meters C. 14.3 cubic meters D. 2011 cubic meters

Mathematics

Find (a) the gross profit, (b) the net income before taxes, and (c) the net income after taxes.Steel Master Sales had a cost of goods sold of  operating expenses of  returns of  taxes of  and gross sales of 

A. (a) $381,000 (b) $121,000 (c)$94,100 B. (a) $365,000 (b) $121,000 (c)$94,100 C. (a) $294,000 (b) $121,000 (c)$94,100 D. (a) $278,000 (b) $121,000 (c)$94,100

Mathematics