Help me with this pls

Ascientist discovers a new body between the orbit of neptune and the kuiper belt. the object is round and travels in an orbit around neptune with other space objects. the scientist claims that she has found a new dwarf planet. where is the scientist’s error?

Which is an example of a decomposer? a. bear b.algae c.grass d.bacteria d bacteria

The activity of the modern sample is 1.10 bq . how long does that measurement take?