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my username is ICEBOSS200
Answer: 
Explanation:
We are asked to multiply 1 nano sec with 1 km/sec.
The conversion used from nano second to second
1 nsec = 
The conversion used from km to meters:
1 km = 1000 m

Putting the values we get:

Therefore, the given conversion is 
Answer: Income is used to fund day-to-day expenditures. Investments, pensions, and Social Security are primary sources of income for retirees. For individuals, income is most often received in the form of wages or salary. Business income can refer to a company's remaining revenues after paying all expenses and taxes.
Answer: the answer is D. i know it's correct
Explanation: Penn Foster's test