Posted by Jayson on Saturday, December 10, 2011 at 12:55am.
The population, P, of a town is modelled by the equation P=6x^3 +7x +750, where x is the number of years since the year 1960.
a) What was the population of the town in the year 1960?
P=6x^3 +7x +750
=6(60)^3 + 7(60) + 750
=6(216000)+420+750
=1296000+420+750
=1,297,170
The pop. was 1,297,170?

Math  Steve, Saturday, December 10, 2011 at 5:22am
If x is the number of years since 1960, then for the year 1960, x=0.
So, P(0) = 750.
Looking at your work, it appears that x is the number of years since 1900. In that case, your answer is correct. 
Math  Jayson, Saturday, December 10, 2011 at 12:03pm
Its since 1960, so I plug in x=0 instead of 60?