Decide whether or not the matrices are inverses of each other.
and 
A. Yes
B. No
Answer: A
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Use the quotient rule to simplify the expression. Write the answer with only positive exponents.
A. 
B. 314
C. -314
D. 
The position vector of a particle is r(t). Find the requested vector.The velocity at t = 1 for r(t) = (4t2 + 3t + 7)i - 6t3j + (7 - t2)k
A. v(1) = 7i - 6j - 1k B. v(1) = 11i + 18j + 2k C. v(1) = 5i - 18j - 2k D. v(1) = 11i - 18j - 2k
Solve. Remember to insert units when writing your answer.A cab driver paid $22.93 to fill her car with 50.4 liters of gasoline. Find the price per liter of the gasoline to the nearest tenth of a cent.
A. $2.198 B. $0.220 C. $0.455 D. $4.550
Calculate the present value when A=$29,000, r=10% compounded quarterly, and t=20 years. Round to the nearest cent.
a. $4,022.43 b. $4,119.32 c. $9,666.67 d. $4,310.67 e. $209,077.47