Find the absolute value.|-11|
A. ± 11
B. 0
C. -11
D. 11
Answer: D
Mathematics
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The pH of a solution is given by the formula 
, where 
is the concentration of hydrogen ions in moles per liter in the solution. Use this formula to solve the problem.Find the pH value of a sample of lake for which [H+] = 0.00000000305. Round to the nearest tenth.
A. 8.5 B. 10.1 C. 7.3 D. 6.4
Mathematics
Solve and check.
+ 2 = 7
A. 9 B. 1 C. 5 D. 25
Mathematics
Simplify.(10x - 6
)2
A. 100x2 - 120x
+ 900
B. 100x2 + 180
C. 100x2 - 120x
+ 180
D. 100x2 + 900
Mathematics
The following comparison line graph indicates the number of vehicles sold for a seven week period by two different salespeople. Use the graph to answer the question.
How many vehicles did Pat sell in the third week?
A. 1 vehicle B. 4 vehicles C. 3 vehicles D. 2 vehicles
Mathematics