1 cg ---------- 0.1 dg
457 cg ------- ?
457 x 0.1 / 1
= 45.7 dg
An isotope of an element is another element that has the same number of protons but a different number of neutrons (for instance

and

)
Fungi is an example of a decomposer.
The answer is 1815.15 mm hg