Simplify. Assume that variables can represent any real number.
A. 3z3
B. 3z2
C. 9z3
D. 9z2
Answer: B
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Find the inverse of the matrix (if it exists).A = 
A. A-1 = 
B. No solution
C. A-1 = 
D. A-1 = 
Solve the problem.On the November 6 billing date, Terry had a balance due of $455.76 on his credit card. The transactions during the following month were: 
The interest rate on the card is 1.6% per month. Using the average daily balance method, find the balance due on December 6 (November has 30 days).
A. $465.73 B. $396.90 C. $711.51 D. $711.47
Solve the initial value problem for x as a function of t.(t2 + 4t)
= 4x + 12, x(1) = 1
A. x = 
- 3
B. x = 20t + ln 
- 3
C. x = 
- 3
D. x = 20 ln
- 3
Solve the problem.A tank contains 1
gallons of water. Its capacity is 
How much more water is needed to fill it?
A. 
gal
B. 
gal
C. 4
gal
D. 6
gal