; to find the length of the hypotenuse, you have to use the pythagorean theorem, which states that, in a right triangle,
.
and
would be the two legs, while
would be the hypotenuse. You need to plug in the values of the legs as
and
:
. Solve for the squares of the two numbers, resulting in
, and ultimately
. Find the square root of
and
, and you get
.
Answer:
The most likely explanation is that the star is a member of an eclipsing binary star system.
Explanation:
An eclipsing binary star system takes place when two stars which are close to each other move in an orbit in which sometimes, one star can hide the light behind the other.
There are two types of eclipses depending on the orientation of the orbit and the size of the stars: the totals or the annular ones. It may also be the case that the eclipses are partial.
<em>Algol </em>is the best known eclipsing binary star, and the first of this kind to be discovered. Its interval between eclipses is 173 hours (2.9 days).
When this type of eclipses happens, the brightest star provides 92% of the light of the system, while the eclipsed only contributes less than 8%, and there is a third star, which is not eclipsed.
Therefore, if there is any star that has been bright most of the time, and during certain time intervals it becomes dimmer, that star is being overshadowed.
B; As far as the relation between humans and the environment, it is obvious how much they relied on it. Not only as a food source, but for economic growth and sustainability as well. The other answers make valid points but in the context of this question, the only one that even mentions the relation is B.
•Rule our new roads
•Continue to invest in space for more efficient modes of transport
•Revisit congestion charging
•Invest in more people walking
