Answer:
2,21 * 10^20
Step-by-step explanation:
Answer:
46°
Step-by-step explanation:
tan Ф = 21/20
Ф = tan-1 (21/20)
= 46°
Answer:
Step-by-step explanation:
It is true that for any given odd integer, square of that integer will also be odd.
i.e if
is and odd integer then
is also odd.
In the given proof the expansion for
is incorrect.
By definition we know,

∴ 
Now, we know
and
will be even values
∴
will be odd
hence
will be odd, which means
will be odd.
Answer:
471.24
Step-by-step explanation:
Answer:
120 meters
Step-by-step explanation:
Bob's land is a rectangle, so it has 2 long and 2 short sides. The Long side is 40 meters long, and the short side is 20 meters long.
Let's add them: 40 + 20 = 60 meters
Since we have 2 of those sides, we will multiply it by 2 which we can demonstrate as
60 meters * 2 = 120 meters