Angle C is 72 degrees and angle D is 108 degrees
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! =)
Salt flows in at a rate of (5 g/L)*(3 L/min) = 15 g/min.
Salt flows out at a rate of (x/10 g/L)*(3 L/min) = 3x/10 g/min.
So the net flow rate of salt, given by in grams, is governed by the differential equation,
which is linear. Move the term to the right side, then multiply both sides by :
Integrate both sides, then solve for :
Since the tank starts with 5 g of salt at time , we have
The time it takes for the tank to hold 20 g of salt is such that