The Sizes of Two Matrices Are Given $2 \times 1$ ; B Is

question 179

Multiple Choice

The sizes of two matrices are given. Find the size of the product AB and the size of the product BA, if the given product
can be calculated.
-A is $2 \times 1$ ; B is $1 \times 1$ .

• A) \(\mathrm { AB }\) cannot be calculated; \(\mathrm { BA }\) is \(1 \times 2\).
• B) \(\mathrm { AB }\) is \(1 \times 2\); \(\mathrm { BA }\) is \(1 \times 1\).
• C) \(\mathrm { AB }\) is \(2 \times 1\); BA cannot be calculated.
• D) \(\mathrm { AB }\) is \(2 \times 2\); \(\mathrm { BA }\) is \(1 \times 1\).

Apply the concept of the time value of money to personal and business financial decisions.

Interpret how changes in interest rates affect the present value of future payments.

Understand and apply the rule of 70 in estimating how long it takes for an investment to double.

Evaluate the impact of interest rates on loanable funds and investment spending.

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Definitions:

Purchase Price

The amount of money paid to acquire a good, service, or financial asset.

Face Value

The nominal value printed on a bond or stock certificate; it does not fluctuate with market prices.

Forward Rate

The agreed-upon price for a transaction that will occur at a future date, as in a forward contract.

Zero-Coupon Bond

A bond that is sold at a discount and pays no interest, but is redeemed at its face value at maturity, generating a profit for the holder.