Solve the problem.pH = -log10[H+] Find the pH if the [H+] = 1.9 × 10-12.
A. 12.28
B. 11.28
C. 12.72
D. 11.72
Answer: D
Mathematics
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Evaluate the algebraic expression for the given values of the variables.8 + x ÷ 1 + y, for x = 3, y = 10
A. 13 B. 12 C. 21 D. 20
Mathematics
Use the order of operations to evaluate each problem.3 ? (7 - 1) + 
A. 31 B. 25 C. 39 D. 27
Mathematics
Provide an appropriate response. Find the rate when the portion is 356 and the base is 534.
A. 
%
B. 9%
C. 150%
D. 
%
Mathematics
Solve the problem.Your home state uses a linear model y= 45(x - 70) + 1610 to predict the number of vacationers (y) as compared to the average temperature for that week (x). Find the number of vacationers predicted for a week with an average temperature of 60 degrees.
A. 1160 vacationers B. 7460 vacationers C. 4240 vacationers D. 72,000 vacationers
Mathematics