[ Calculus Archive ]
During the process of inversion, the amount A of raw sugar present decreases at a rate proportional to A. During the first 10 hours, 1,000 pounds of raw sugar have been reduced to 800 pounds. How many pounds will remain after 10 more hours of inversion?
The population tends to grow with time at a rate roughly proportional to the population present. According to the Census Bureau, the population of the US in 1970 was approximately 203 million and in 1980, 227 million. Use this information to estimate the population of 1960. [The actual figure was about 179 million].
