Answer:

Composition and Structure of the Oceans. Planet Earth has been called the "Blue Planet" due to the abundant water on its surface. Here on Earth, we take liquid water for granted; after all, our bodies are mostly made of water.
Answer:
see explanation
Step-by-step explanation:
The ones ticked are correct
Given
6 + 18 + 54 + 162 + 486
There is a common ratio r between consecutive terms, that is
18 ÷ 6 = 54 ÷ 18 = 162 ÷ 54 = 486 ÷ 162 = 3
This indicates the series is geometric with explicit formula
= a 
where a is the first term and r the common ratio
Here a = 6 and r = 3, thus explicit formula is
= 6 
The series in summation form with 5 terms in the series is
∑ 6
for k = 1 to 5
Sum = 6 + 18 + 54 + 162 + 486 = 726
Answer:
x = 15
Step-by-step explanation:
angle FoH = 360° - 90° - 90° - angle G
= 180° - 75°
= 105°
17x° = 360° - angle FoH
17x° = 360° - 105°
17x° = 255°
x = 255 ÷ 17
x = 15
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16 and 72 would be the answer
the relationship between the two columns would be +2
hope this helps :)