Hello!
We have the following data:
Lupu Bridge (China) = 12,795 feet long
Hart Bridge (USA) = 3,845 feet long
Let's divide the largest length by the shortest length, so we'll know how many times the Lupu Bridge is bigger than the Hart bridge, let's see:
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I Hope this helps, greetings ... DexteR! =)
The angle does not matter. Think of it as finding the other side to a triangle. Use
a=39 (line AB)
b=b (the leg we need to find)
c=89 (line BD)
(subtract the 1521 from both sides)
(square root both sides)
b = 80
AD=80
Given:
Dimensions of rectangular prism X are twice the dimension of rectangular prism Y.
prism X = 2(prism Y)
Surface area of X = 2(Surface area of Y)
100 square inches = 2(Surface area of Y)
100 square inches ÷ 2 = Surface area of Y
50 square inches = Surface area of Y
Dimensions of Prism Z are three times the dimensions of rectangular prism Y.
Prism Z = 3(Prism Y)
Surface Area Z = 3(50 square inches)
Surface Area of Z = 150 square inches