A 100-gallon tank is initially filled with pure water. Salt solution begins to flow into the tank from two sources. From one source, salt solution containing 1 pound of salt per gallon flows in at a rate of 2 gallons per minute. The second source gives 3 gallons of salt solution per minute at a decreasing concentration C(t) = 2e−2t pounds per gallon where t gives the number of minutes since the flow began. The well-mixed solution is pumped out at a rate of 5 gallons per minute. Find the mass of salt in the tank at time t.

Mercury poisoning is dangerous overload of mercury within the body. a major source of mercury within the body, a major source of mercury poisoning is consuming fish that contain mercury. certain fish are more prone to having higher levels of mercury than others. the pie chart shows the distribution of four breeds of fish at a hatchery. the hatchery has approximately 6,000 fish. a biologist from the centers for disease control and prevention randomly test 5% of each breed of fish for mercury content. her findings are shown in the following table. based on the biologist's findings, if a single salmon is randomly selected from those that were tested, what is the probability that this particular fish would have a dangerous mercury level? a) 0.001 b) 0.004 c) 0.02 d) 0.08

Acircus act has 3 times as many elephants as acrobats. jorge noticed that all together there were 56 legs in the circus ring. how many elephants were in the show?

The formula for finding volume of a cone 1/3pi x r^2h. the volume of a cone is 300 cm^3 and the height of the cone is 10 what is the approximate radius of the cone