Answer:
si
Step-by-step explanation:
Answer:
A. 6.9
Step-by-step explanation:
Edge 2020
Answer:
Precambrian period
Step-by-step explanation:
Since the Great oxidation period = 2.4 Billion years ago era = Precambrian period.
Micro-fossils attributed to cyanobacteria are abundant during the Proterozoic that came later 2,5 billion years ago and ended 540 million years ago,
80% × x = 32
.80x = 32
x = 32/.8
x = 40
