Many physical processes are exponential in nature. A typical way of cleaning a tank of contaminated water is to run in clean wat
er at a constant rate, stir, and let the mixture run out at the same rate. Suppose there are initially 100 pounds of a contaminant in a large tank of water. Assume that the cleaning method described above removes 20% of the remaining contaminant each hour. Round your answer to one decimal place. How much contaminant is removed from the tenth (t = 10) to the thirteenth (t = 13) hour of the cleaning process? lb
The sides of the rectangle are aligned with the coordinate axes, so the dimensions of the rectangle are easily determined to be 4 -(-7) = 11 units by 1 -(-1) = 2 units. As with any rectangle, the area is the product of length and width.