Multiply and simplify. Express answers in exponential form with positive exponents only. Assume that all variables represent nonzero quantities.y-6 ? y-3
A. 
B. 
C. 
D. y9
Answer: C
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Expand the notation and find its value.93
A. 9 + 9 + 9 = 512 B. 9 + 9 + 9 = 27 C. 9 ? 9 ? 9 = 729 D. 9 ? 9 ? 9 = 19,683
Evaluate the integral by making a substitution and then using a table of integrals.
A. 
tan-1 
+ C
B. 
tan-1 
+ C
C. 
sin-1 
+ C
D. 
sin-1 
+ C
Solve the problem. Round amounts of money to the nearest cent.In chemistry class, each of the 79 students needs 79 mL of titrate. How many one-liter bottles of titrate need to be available?
A. 7 bottles B. 6 bottles C. 62 bottles D. 8 bottles
The augmented matrix is in row-echelon form and represents a system of linear equations. Solve the system using backward substitution.
Write the solution as an ordered triple, if possible.
A. (-5, 1, 2) B. (2, -7, -17) C. No solution D. (17, -7, 2)