The population of a certain species of bird in a region after t years can be modeled by the functionP(t)= 1620/1+1.15e^-0.042t. What is the maximum population of the species in the region? , where t ≥ 0. When will the population reach 1,200?

A. about 10 years

B. about 28 years

C. about 35 years

D. about 42 years

The means and mean absolute deviations of the individual times of members on two 4x400-meter relay track teams are shown in the table below. means and mean absolute deviations of individual times of members of 4x400-meter relay track teams team a team b mean 59.32 s 59.1 s mean absolute deviation 1.5 s 245 what percent of team b's mean absolute deviation is the difference in the means? 9% 15% 25% 65%

Explain why the factor 1.5 is broke. into two numbers in the model.

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?