Solve the Problem A) Yes
B) No

question 71

Multiple Choice

Solve the problem.
-Does the commutative property of multiplication, A × B = B × A, hold for matrices A and B? $$A = \left[ \begin{array} { r r r } - 9 & 7 & 2 \\3 & 5 & 1 \\9 & - 4 & 9\end{array} \right] , B = \left[ \begin{array} { l l l } 1 & 0 & 0 \\0 & 1 & 0 \\0 & 0 & 1\end{array} \right]$$

• A) Yes
• B) No

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Definitions:

Streetlights

Streetlights are outdoor lighting fixtures placed along streets, designed to enhance visibility and safety during nighttime.

Market Failure

A situation in which the allocation of goods and services by a market is not efficient, often leading to a net social welfare loss.

Marginal Benefit

The increased happiness or advantage derived from the consumption of one more unit of a good or service.

Marginal Cost

The cost of producing one more unit of a good or service, often key to determining the optimal level of production.