Use the pH scale to answer the question.What is the hydrogen ion concentration of a solution with pH 2.5?
A. 3.2 x 10-3
B. 3.2 x 10-2
C. 3.2 x 10-5
D. 3.2 x 10-4
Answer: A
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Solve the problem.Two cars leave an intersection. One car travels north; the other east. When the car traveling north had gone 9 miles, the distance between the cars was 3 miles more than the distance traveled by the car heading east. How far had the eastbound car traveled?
A. 18 mi B. 9 mi C. 15 mi D. 12 mi
Find the inverse, if it exists, for the matrix.
A. 
B. 
C. 
D. The inverse does not exist.
Provide an appropriate response.How many different sequences of 4 digits are possible if the first digit must be 3, 4, or 5 and if the sequence may not end in 000? Repetition of digits is allowed.
A. 1512 B. 5000 C. 2999 D. 2000 E. 2997
Solve the problem.Given the area of the figure, factor to find possible expressions for the length and the width. 
A. (12x + 3)(x + 3) B. (4x + 3)(3x + 4) C. (4x - 3)(3x - 4) D. (12x + 3)(x + 4)