Identify the elements that appear before iron (Fe) in the periodic table.

Co
Cu
Ni
Mn
K

Match the digestive enzymes to the macromolecules they to digest. break down fats into glycerol and fatty acids break down carbohydrates into simple sugars break down nucleic acids into nitrogenous bases and simple sugars break down proteins into amino acids

Plz ! ive been stuck on this forever

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?