What role did the bantu have in the development of swahili culture

The Swahili Culture has developed over a thousand years via the amalgamation of various cultures.Mainly however it developed as a result of the native Bantu tribes that encountered the Arabs who set up trading outposts that resulted in the further development of villages and towns along the East African Coast. The members of these Bantu tribes intermarried with the Arabs who were foraging for natural resources, hunting for ivory and bringing the slave trade to life along these shores. 

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what are local authorities doing to fix the problem

explanation:

the answer is: must pay taxes on profits

since it is considered as a part of your income, profits from investments is eligible for tax payment.

the tax from your investment could be influenced by how long you decided to sell it. united states promotes keeping your investment for long term period. so, the tax rate for investments that you sell in less than one year is typically higher compared to investments that you sell in more than one year period.