Each individual in a biological population is assumed to give
birthat an exponential rate
,and to die at an exponential rate
. in addition, there is an exponential rate ofincrease
due to immigration. however, immigration is not allowed whenthe
population size is n or larger.

set this up as a birth and death model.

To keep cylindrical tanks from tipping over, a designer is planning to enlarge the original area of the base by 50%. the new tank should have the same volume as the original. how should the designer change the height of the tank? a: make it 50% taller than the height of the original tank. b: make it 6623% taller than the height of the original tank c: make it 3313% shorter than the height of the original tank d: make it 50% shorter than the height of the original tank.