It is very often claimed that the amount of coal that is present on Earth as of the moment will last us several hundreds of years. However, World Coal Association reported that at the current rate of coal usage, deposits will only last for approximately 110 years. Thus, the answer should be letter C.
Answer:
11 billion
Explanation:
The global population is constantly on the rise. There are significant demographic differences around the world, and i general they can be taken regionally.
- Europe, the Americas, and East Asia tend to have low birthrates and low mortality rates. This leads to aging populations, and gradually the populations will start to stagnate and even decrease.
- On the other side, Africa, South Asia, Southeast Asia, the Middle East, are regions that have very high birthrates, and even though the mortality rates are much higher than the previously mentioned regions, they still manage to have big increase in their population.
- In a way, this disproportion is actually balancing the global population, so its rise is not as dramatic as in the past. It is expected that the population will continue to rise, but that the rise will constantly go down. The estimates are that by the year of 2100, the world will have a population of just above 11 billion people, 11.2 billion to be more precise.
The Moons rotation is precisely equal to it’s period of revolution.
Similarities between angle bisector and perpendicular bisector:
Perpendicular bisector bisects a line segment into two equal parts at 90°.
Angle bisector bisects an creating two congruent angles
they both bisect into equal parts
Construction of an angle bisector starts by defining a segment that is a chord of a circle with the given angle as the central angle. From there, the constructions proceed in the same way, as the perpendicular bisector of the chord bisects the central angle.