The underground temperature, a basis fro geothermal energy source, can be approximated using the function T(d)=35d+20, where T is in oC, d is the distance from the land surface in km. Find the underground temperature 3,500m below the surface.
Answers
q+34=35d
let you assume x and y
Given : The underground temperature, a basis for geothermal energy source, is approximated using the function :
T(d)=35d+20 T is in °C , d is the distance from the land surface in km.
To Find : the underground temperature 3,500m below the surface.
Solution:
T(d)=35d+20
d = 3,500m below the surface.
1000 m = 1 km
=> d = 3500/1000 km
=> d = 3.5 km
Substitute value of d = 3.5
in T(d)=35d+20
=> T (3.5) = 35(3.5) + 20
=> T (3.5) = 122.5 + 20
=> T (3.5) = 142.5 °C
142.5 °C is the underground temperature 3,500m below the surface.
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