Solve the problem. When appropriate, round the solution to the nearest tenth. As needed, use the formula 
Find the [H3O+] if the pH = 6.
A. 1.8
B. 10-6
C. 0.2
D. 106
Answer: B
Mathematics
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Convert to a mixed numeral.
A. 
B. 248
C. 248
D. 49
Mathematics
At one high school, students can run the 100-yard dash in an average of 15.2 seconds with a standard deviation of 0.9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are:Between 16.1 and 17 seconds
A. 12% B. 13.5% C. 27% D. 34%
Mathematics
Perform the indicated operation and simplify.
+ 
+ 4
A. 
B. 
C. 
D. 
Mathematics
Find the absolute value of the complex number.z = 2 - i
A. 5
B. 
C. 3
D. 
Mathematics