SOLUTION: PLEASE HELP ASAP: The number of senior citizens in the US in millions (n) years after 1990 can be estimated by using the formula: s = 0.38n + 31.2 The percentage of senior citizen

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Question 28654: PLEASE HELP ASAP: The number of senior citizens in the US in millions (n) years after 1990 can be estimated by using the formula: s = 0.38n + 31.2
The percentage of senior citizens living below poverty level (n) years after 1990 can be estimated by using the formula: p = -0.25n + 12.2
a.) How many senior citizens were there in 2000?
b.) In what year will the percentage of seniors living below poverty level reach 7%?
Thank you so much
Answer by venugopalramana(3286) About Me  (Show Source):
You can put this solution on YOUR website!
The number of senior citizens in the US in millions (n) years after 1990 can
> be estimated by using the formula: s = 0.38n + 31.2
> The percentage of senior citizens living below poverty level (n) years after
> 1990 can be estimated by using the formula: p = -0.25n + 12.2
> a.) How many senior citizens were there in 2000?
s = 0.38n + 31.2
YEARS ELAPSED FROM 1990 TO 2000 = 2000-1990 =10
S=0.38*10+31.2=3.8+31.2=35 MILLION
> b.) In what year will the percentage of seniors living below poverty level
> reach 7%?
p = -0.25n + 12.2 =7 GIVEN
12.2-7=0.25N
0.25N=5.2
N=5.2/0.25=20.8 YEARS
THAT IS 20.8 YRS AFTER 1990 =1990+20.8=2010.8...THAT IS IN YEAR 2011...