An entrepreneur's expertise and ability to fund an idea helps to differentiate: a. Between success and failure
b. Between an idea and an opportunity
c. Between a good and bad business owner
d. Between good and evil

Alarge tank is filled to capacity with 500 gallons of pure water. brine containing 2 pounds of salt per gallon is pumped into the tank at a rate of 5 gal/min. the well-mixed solution is pumped out at the same rate. find the number a(t) of pounds of salt in the tank at time t.