Asked by lis

Union membership as a percentage of the labor force can be modeled by
M(x) = 0.0003x3 − 0.066x2 + 4.64x − 81, where x is the number of years after 1900,and M is membership as a percentage of the labor force.
a. Find the rate at which membership is changing in 1960.
b. Find the rate at which membership is changing in 1985.
Answered by Steve
M'(x) = .0009x^2 - .132x + 4.64

Now just evaluate M' for your years.
Answered by lis
ty!
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