A farmer has 2000 feet of fencing available to enclose a rectangular field.One side of the field is a river, so only three sides require fencing.Express the area A as a function of x, where x is the length of the side parallel to the river.

a)A = -x/2 + 2000x

b)A = - x/2 + 1000x

c)A = x - 2000x

d)A = x + 1000x

e)A = -x + 1000x

The function w(x) = -0.01x + 0.27x + 8.60 can be used to estimate the number of self-employed workers in America in millions, x years after 1980.For what years were there (or will be there) 9.7 million self-employed worker in America?

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