Sin35= x/20
x = sin35 * 20
x = 11.47
x = 11.5
answer
C. 11.5
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cos41 = x/11
x = 11 * cos41
x = 8.3
answer
A. 8.3
Suppose that a large mixing tank initially holds 300 gallons of water is which 50 pounds of salt have been dissolved. Another brine solution is pumped into the tank at a rate of 3 gal/min, and when the solution is well stirred, it is then pumped out at a slower rate of 2 gal/min. If the concentration of the solution entering is 2 lb/gal, determine a differential equation for the amount of salt A(t) in the tank at time t.
1 pie is cut into eighths or 1/8 a slice. 3 are taken out.
8/8-3/8=5/8 is left.
