A once-popular children's doll is slowly declining in popularity. The quartic function f(x) = 0.002x4 +0.025x³ -0.364x² -7.243x

Question

A once-popular children's doll is slowly declining in popularity. The quartic function f(x) = 0.002x4 +0.025x³ -0.364x² -7.243x + 86.993, where x is the number of years since 1993, can be used to estimate the number
of dolls of this type that were sold (in thousands) during a given year from 1993 to 2003. Estimate how many dolls were sold in 1995.

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