Use the given zero to find all the zeros of the function

given zero: 3i

(the i is imaginary)

function: f(x)=x³+x²+9x+9

explain i do not understand

What is the maximum total area that 450cm of string can enclose if it is used to form perimeters of two adjoining rectangles as shown?

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

Ataxi company charges $2.25 for the first mile and then $0.20 per mile for each additional mile, or f = $2.25 + $0.20(m - 1) where f is the fare and m is the number of miles. if juan's taxi fare was $6.05, how many miles did he travel in the taxi? if juan's taxi fare was 7.65, how many miles did he travel in taxi