Answer:
A decomposer
Explanation:
An organism like a fungus or a worm breaks down dead, nonliving matter which ends up giving nutrients back into the soil.
4.7e^6 is how I would write it. You simply count in from the right side where the decimal is until you reach the point just before the 4.
I think it's "one times".
To become an ion a calcium atom would have to lose 2 electrons.
