a. Who ended the system of apartheid in South Africa? b. How has AIDS affected Botswana's economy? c. What are some of the major traditional cultural activities in Southern Africa?

Assume Adams & Murray, the accounting firm, advises Pappadeaux Seafood that its financial statements must be changed to conform to GAAP. At December 31, 2012, Pappadeaux’s accounts include the following:

$$\begin{matrix} \text{Cash..................................................................................... } & \text{\$ 59,000 }\\ \text{Short-term investment in trading securities, at cost ..............} & \text{27,000 }\\ \text{Accounts receivable..............................................................} & \text{37,000 }\\ \text{Inventory..............................................................................} & \text{60,000 }\\ \text{Prepaid expenses..................................................................} & \text{17,000 }\\ \text{Total current assets.........................................................} & \text{\$200,000 }\\ \text{Accounts payable.................................................................} & \text{\$ 61,000 }\\ \text{Other current liabilities........................................................} & \text{ 36,000 }\\ \text{Total current liabilities....................................................} & \text{\$ 97,000}\\ \end{matrix}$$

The accounting firm advised Pappadeaux of the following: Cash includes $18,000 that is deposited in a compensating balance account that is tied up until 2014. The market value of the trading securities is$13,000. Pappadeaux purchased the investments a couple of weeks ago. Pappadeaux has been using the direct write-off method to account for uncollectible receivables. During 2012, Pappadeaux wrote off bad receivables of $8,000. Adams & Murray determines that uncollectible-account expense should be 3% of service revenue, which totaled$590,000 in 2012. The aging of Pappadeaux’s receivables at year-end indicated uncollectibles of $9,700. Pappadeaux reported net income of$90,000 in 2012. Restate Pappadeaux’s current accounts to conform to GAAP. (Challenge). Compute Pappadeaux’s current ratio and quick (acid-test) ratio both before and after your corrections. Determine Pappadeaux’s correct net income for 2012.(Challenge)

Show that (a)

$$\operatorname{det}\left[\begin{array}{ccc}{0} & {0} & {a_{13}} \\ {0} & {a_{22}} & {a_{23}} \\ {a_{31}} & {a_{32}} & {a_{33}}\end{array}\right]=-a_{13} a_{22} a_{31}$$

. (b)

$$\left[\begin{array}{cccc}{0} & {0} & {0} & {a_{14}} \\ {0} & {0} & {a_{23}} & {a_{24}} \\ {0} & {a_{32}} & {a_{33}} & {a_{34}} \\ {a_{41}} & {a_{42}} & {a_{43}} & {a_{44}}\end{array}\right]=a_{14} a_{23} a_{32} a_{41}$$

.