Math Problem Solver

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Part 1

A​ once-popular children's doll is slowly declining in popularity. The quartic function f left parenthesis x right parenthesis equals negative 0.025 x Superscript 4 Baseline plus 0.561 x cubed minus 3.617 x squared minus 1.219 x plus 86.923 comma 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 1994.