median family income in country x between 1990 and 1999 can be modeled f(x)=1154.1(x-1990) 35,671 wh

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median family income in country x between 1990 and 1999 can be modeled by f(x)=1154.1(x-1990)+35,671 where x is the year. Determine symbolically when the median income was 42,954

Jul 19th, 2015

Thank you for the opportunity to help you with your question!

f(x) = 1154.1(x-1990)+35671 = 42954

solve for x 

x-1990 = (42954-35671)/1154.1  = 6.31

x = 1996.31

the time is about April of 1996


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Jul 19th, 2015

If an earthquake has an intensity of x then it's magnitude as computed by the Richter scale is given r(x)=log x/i0 (i0=1) if one earthquake has a magnitude of 2.8 on the Richter scale and a second earthquake has a magnitude of 5.4 on the Richter scale how many times more intense to the nearest whole number is the second earthquake than the first?

Jul 19th, 2015

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