Answer:
19.68
Explanation:
Given:
Vertices : (-5,2), (3,2), (1,6)
To get the length of each side, we need to
Length = √(x2 - x1)^2 + (y2 - y1)^2
calculate the distance between the points ;
Taking, (-5,2), (3,2)
L1 = √(3 -(-5))^2+ (2 -2)^2
L1 =√(3 + 5)^2 + 0^2
L1 = √8^2 = √64 = 8
Taking L2 ; (3,2), (1,6)
L2 = √(1 -3)^2 + (6 - 2)^2
L2 = √ (-2)^2 + 4^2
L2 = √ 4 + 16
L2 = √20 = 4.47
Taking L3 ; (-5,2), (1,6)
L3 = √(1 - (-5))^2 + (6 - 2)^2
L3 = √(1 + 5)^2 + (6 - 2)^2
L3 = √6^2 + 4^2
L3 = √36 + 16 = √52
L3 = 7.21
Therefore, perimeter = L1 + L2 + L3
8 + 4.47 + 7.21 = 19.68
The Continental Divide divides the region into two large drainage areas. To the east of the Divide, waters, flow to the Arctic Ocean, to the Hudson Bay, or to the Atlantic oceans through the Mississippi River system. To the West, they flow into the Pacific Ocean. Hope this helps. ;)
@yha
Mermaids don’t exist.... they are just irish folk tale :|
Answer:
The age of the rock = 2800.6 million years = 2.8 billion years.
A simple method of analysis similar to Carbon dating is used to obtain the required age of the rock. Radioactive substances decay according to first order reaction kinetics. So, plugging all the required parameters into the general equation for amount of substance left in a first order decay gives us the age of the rock.
Explanation:
Half life of Uranium-235 = 700 million years (from literature)
The decay of radioactive substances follow first order reaction kinetics.
The general equation is given as
A(t) = A₀ e⁻ᵏᵗ
A(t) = Amount of radioactive substance left after a particular time = 6.25%
A₀ = initial amount of radioactive substance = 100%
t = time that has passed since the beginning = age of the rock = ?
k = decay constant
The decay constant is related to the half life (T) through the relation,
k = (In 2)/T
k = (0.693/700) = 0.00099 /million years
A(t) = A₀ e⁻ᵏᵗ
6.25 = 100 e⁻ᵏᵗ
0.0625 = e⁻ᵏᵗ
In e⁻ᵏᵗ = In 0.0625 = -2.7726
-kt = - 2.7726
t = (2.7726/0.00099) = 2800.6 million years
t = 2.8 billion years.
Hope this Helps!!!
The correct answer is D. How national borders in a region change over time.
Explanation:
The main purpose of maps is to show geographical features including natural physical features such as mountains or rivers, and political features that refer to the use of land by humans and the divisions created by them. Due to this, through maps, it is possible to visually show cities, states, regions countries, etc. In this context, a series of maps can be used to show the evolution or change of national borders because this is part of political features. Also, other aspects such as policies, beliefs, or economic events are not geographical and due to this cannot be depicted through maps.
