DQ 1 WK 4.docx - According to question The number of the senior citizens(65 and over in the United States in millions n years after 1990 s = 0.38n

# DQ 1 WK 4.docx - According to question The number of the...

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According to question, The number of the senior citizens (65 and over) in the United States in millions n years after 1990, s = 0.38n + 31.2……………..(i) The percentage of senior citizens living below the poverty level n years after 1990, p = - 0.25n + 12.2…………(ii) For Case 1 We have, Number of years (n) = 10 (2000 to 1990) Number of senior citizens in 2000 (s) = ? Now, s = 0.38n + 31.2 s = 0.38 * 10 + 31.2 s = 3.8 + 31.2 s = 35 Therefore, there were 35 million senior citizens in the year 2000 For Case 2 We have, The percentage of senior citizens living under the poverty level (p) = 7% Particular year with 7% poverty level = ? Now, p = - 0.25n + 12.2 7 = - 0.25n + 12.2 7 + 0.25n = 12.2 0.25n = 12.2 - 7
0.25n = 5.2 n = 5.2/0.25 n = 20.8 n = 21 (Rounding up) Therefore, after approximately 21 years (which is in 2011) the percentage of senior citizens

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• Summer '19
• Elementary algebra, 1920, 2000, Poverty in the United States, Year 2000 problem