A solution is an acid if its pH is less than 7 and a base if its pH is greater than 7. The pH is defined by 
where [H+] is the concentration of hydrogen ions in the solution. Use this information to answer the question.A mixture has a pH of 9.8. Find the concentration of hydrogen ions [H+] in the mixture. Is the mixture an acid or a base?
A. 109.8, acid
B. 10-9.8, base
C. 109.8, base
D. 10-9.8, acid
Answer: B
Mathematics
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A. 
; 
2
B. 0; 
2
C. 
; 
2
D. 49; 
2
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Find the center and radius of the circle.x2 + y2 + 6x - 18y + 90 = 81
A. (-9, 3), r = 81 B. (3, -9), r = 81 C. (-3, 9), r = 9 D. (9, -3), r = 9
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Governor Anne Kelly won the election by a ratio of 10 to 7. If she 4. got 720,000 votes, how many did the other candidate receive?
(a) 360,000 (b) 550,000 (c) 670,000 (d) 504,000
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Determine if the relation is a function.
A. not a function B. function
Mathematics