B. a seashell on the ocean floor
The correct answer is A) at least 500.
The rocks in which the fossils are found, are more often then not, indicators of the age of the fossil itself. So if the estimate of the fossil's age is 500 MYA then the rock is of at least the same age, most of the time older then the fossil.
They have created agencies. Those agencies created rules and regulations to stop the flow of pollution, etc.
It's a stage of the very important Nitrogen cycle. All living things need Nitrogen, without it there is no life.
Answer:
c=49 degrees
b=131 degrees
Explanation:
Angle c and the angle that measures 49 degrees are opposite angles. Opposite angles are equal to each other, so we can conclude that angle c is equal to 49 degrees.
c=49 degrees
Angle c and angle b are both sitting on a straight line, and a straight line has an angle measure of 180 degrees. To find angle b, we can subtract 49 from 180.
b=180-49
b=131 degrees
Therefore,
c=49 degrees
b=131 degrees
I hope this helps!
