The answer is c I hope this helps
Answer:
7. Declining fertility rate
8. Britain, 18th Century
9. Interest rates were very low.
Explanation: 7. The causes of population ageing vary among countries.
8. It transformed economies that had been based on agriculture and handicrafts into economies based on large-scale industry, mechanized manufacturing, and the factory system. Also introduced Capitalism, Urbanization, exploitation of the working class.
9. Southern European countries also share, as a key feature, a combined and uneven capitalist development.
From mapping
- A (40 north 74 west = New york city
- B (76 north 80 west = the perennial ice fields (Craig Harbour)
- C 60 north 147 west=Pacific Ocean. This is further explained below.
<h3>What is a location?</h3>
Generally, a specific spot or position on the map. The Empire State Building, for instance, may be found at a coordinate of 40.7 degrees north (latitude) and 74 degrees west (longitude) (longitude).
In conclusion, It may be found in Manhattan, New York, near the corner of 33rd Street and Fifth Avenue.
Read more about the location
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Answer:
Earthquakes and volcanoes
Explanation:
Earthquakes are caused by any type of plate movement in response to the plates reacting to one another in some way.
Volcanoes can be caused when there is a plate being sucked under another plate causing magma to rise up and eventually errupt.
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!!!
