Which of the following are polynomial functions? check all that apply. a. f(x) =3/5x^4 -18x^2 +5-10/x^2 b. f(x) = -x^3+5x2 +7square rooot x-1 c. f(x) = x^-2 + 15x-3 d. f(x) = 5.3x ^2+ 3x - 2 e. f(x) = 4x^4-10

Which will form a composite function?

Written as a simplified polynomial in standard form, what is the result when (2x+8)^2(2x+8) 2 is subtracted from 8x^2-38x 2 −3?

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?