Find the inverse, if it exists, for the matrix.
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Solve the problem.Find the amount of time required for a $27,000 investment to double if the annual interest rate r is 2.5% and interest is compounded continuously. Round your answer to the nearest hundredth of a year.
A. 408.14 years B. 4.08 years C. 435.87 years D. 27.73 years
Mathematics
Multiply.
? 
A. 
B. 
C. 
D. 
Mathematics
Simplify by writing the expression with positive exponents. Assume that all variables represent nonzero real numbers.
A. 
B. 
C. 
D. 
Mathematics
Write the expression with only positive exponents and evaluate if possible. Assume all variables represent nonzero real numbers.
(-15)
A. 5y B. -5y C. 3y D. 4y
Mathematics