Answer:
D. 3.3 x 10^24
Explanation:
In a number representing a measurement, the significant figure are those digits that have a meaningful contribution to specify the resolution of the measurement.
When a number is written in scientific notation, it is written as:
![N=m \cdot 10^n](https://tex.z-dn.net/?f=N%3Dm%20%5Ccdot%2010%5En)
where
m is the base
n is the exponent
When a number is written in this form, the number of significant figures is the number of digits contained in
.
In this problem, our number is initially written as
![3.311\cdot 10^{24}](https://tex.z-dn.net/?f=3.311%5Ccdot%2010%5E%7B24%7D)
We see that here "m" contains 4 digits, so here we have 4 significant figures.
In order to reduce it to 2 significant figures, we have to rewrite 3.311 as 3.3, therefore the new number will be:
![3.3\cdot 10^{24}](https://tex.z-dn.net/?f=3.3%5Ccdot%2010%5E%7B24%7D)
Which is option D.
The arrow that are drawn correctly are the cool air current and the upper air current. In the sea breeze, warm air moves up because it is less dense that the cool air. The cool air moves down to replace the warm air. The land breeze current moves from the land to the sea while the sea breeze moves from the sea to the land. This creates a continuous flow of current at the sea level.
Answer:
The Persian Gulf and the Tigris and Euphrates
Explanation: