Simplify -3y(y + 2)^2 - 5 + 6y
3y^2 + -6y + -17
nobody had the answer to this question so i took it upon myself

How many zeros does the function f(x)=4x3-x2+1 have

Marco is studying a type of mold that grows at a fast rate. he created the function f(x) = 345(1.30)x to model the number of mold spores per week. what does the 1.30 represent? how many mold spores are there after 4 weeks? round your answer to the nearest whole number. 1.30 represents the number of mold spores marco had at the beginning of the study; 985 mold spores 1.30 represents the number of mold spores grown in a given week; 448 mold spores 1.30 represents the 30% rate of weekly growth; 345 mold spores 1.30 represents the 30% rate of weekly growth; 985 mold spores

Identify the number as a rational or irrational.explain. 127