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You can model the populationof a certain city between the years 1995 and 2000 by the radical function P(x) = 55000 sqrt(x  1945). Using this model, in what year was the population of that city 275,000?
a. 1970
b. 1966
c. 1964
d. 1975
 one year ago
 one year ago
You can model the populationof a certain city between the years 1995 and 2000 by the radical function P(x) = 55000 sqrt(x  1945). Using this model, in what year was the population of that city 275,000? a. 1970 b. 1966 c. 1964 d. 1975
 one year ago
 one year ago

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JonaskBest ResponseYou've already chosen the best response.0
\[275000=55000\sqrt{x1945}\] calc x
 one year ago

angelwings996Best ResponseYou've already chosen the best response.0
Would I subtract 55000 from 275,000?
 one year ago

JonaskBest ResponseYou've already chosen the best response.0
no divide both sides by 55000
 one year ago

chphiranyaBest ResponseYou've already chosen the best response.0
Do u know the 'BODMAS' concept ?
 one year ago

angelwings996Best ResponseYou've already chosen the best response.0
so \[5 = \sqrt{x1945}\]
 one year ago

angelwings996Best ResponseYou've already chosen the best response.0
No, I only know PEMDAS
 one year ago

chphiranyaBest ResponseYou've already chosen the best response.0
The 'BODMAS' concept tells u the order u should follow when simplifying. The order is from top to bottom. B= Brackets ( ) O= Of D= Divide M= Multiplication A= Addition S= Substraction
 one year ago

angelwings996Best ResponseYou've already chosen the best response.0
Okay, but if there is a square root sign, like this one, then how do I know what to do?
 one year ago

angelwings996Best ResponseYou've already chosen the best response.0
\[5^{2} = (x1945)^{2}\] right ?
 one year ago

angelwings996Best ResponseYou've already chosen the best response.0
so \[25 = x  1945 ?\]
 one year ago

Goten77Best ResponseYou've already chosen the best response.1
no... squaring the ride side gets rid of the square root
 one year ago

Goten77Best ResponseYou've already chosen the best response.1
well yes 25=x1945 *u had it written different 1 comment b4*
 one year ago

angelwings996Best ResponseYou've already chosen the best response.0
Oh sorry, then would I add 1945 to 25 and then it will give me x ?
 one year ago

angelwings996Best ResponseYou've already chosen the best response.0
So x = 1970 ? so the answer would be A ?
 one year ago

angelwings996Best ResponseYou've already chosen the best response.0
Okay thanks for your help! (:
 one year ago
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