Hello there! To solve this question, we don't have to put those long numbers in the calculator, because that's just too complicating. Instead, we can convert each number into scientific notation and solve from there. Scientific notation is when you multiply a number greater than or equal to 1 but less than 10 by a power of 10. 330 million in scientific notation is 3.3 * 10^8, because 10^8 is 100 million. 147.2 billion is 1.472 * 10^11 power, because 10^11 is 100 billion. Now, what we do is multiply 3.3 and 1.472 together. 3.3 * 1.472 is 4.8576. Now, we add the exponents together. 8 + 11 is 19. There. There are about 4.8576 * 10^19 cubic miles of water on Earth.
Note: To break it down, you multiply the numbers being multiplied by the power of 10 together first, and then add the exponents to get to a product in scientific notation.
Given that the depth varies directly with amount of rainfall, then we shall have:
let d be the depth and r be the rainfall amount
dαr
thus
d=kr
where, k is the constant of proportionality, thus the formula will be:
d=kr
Answer:
C is the correct answer.
Step-by-step explanation:
That is the correct one because C has 6 pages, as many has the cuboid has. As we see, the others are different.
Three ways are:
<u>In Fraction Form:</u> 
<u>In Ratio its</u>: What you said
7:30 And
In a Percent Form Its:
0.23- %(I got that from dividing 7 by 30.)
Hope IT helped You. :D
