polynomial

Question

Gentamicin is antibiotic frequently used by veterinarians. The concentration in micrograms per milliliter (mcg/mL), of Gentamicin in a horse’s bloodstream t hours after injection can be approximated by the polynomial C = -0.005t^4+0.003t^3+0.35t^2+0.5t. The concentration of Gentamicin in the bloodstream 6 hr after injection is: ____ (mcg/mL).

Answer 1

Using synthetic substitution I get

 

1.628