Find the inverse, if it exists, for the matrix.
A. 
B. 
C. 
D. No inverse
Answer: D
Mathematics
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If a = 2 and b = 5, find:
a. (ab)2 b. a2b c. ab2
Mathematics
Simplify the expression. Include absolute value bars where necessary.
A. (-3)9
B. 
C. 3
D. -3
Mathematics
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. 7.3 C. 6.4 D. 10.1
Mathematics
Perform the indicated operation. Write the answer in simplest form.
? 6
A. 
B. 
C. 
D. 
Mathematics