biology population density

An original count of a deer population in an Alberta forest determined that 238 deer were present. In a later study, this number increased to 431. Using this data, one could determine the __ the population
a) growth rate of
b) per capita growth rate of
c) deaths in
d) births in

 which of the following statements about population density is not correct?
a) population density is the number of individuals per unit area or volume
b) population density is always a whole number
c) population density can change over time.
d) population density can be used to determine the size of population

a population of 10 000 flies double in size every 14 days. The number of flies in the population after 42 days is 40 000 this population of flies is following
a) linear growth
b) logistic growth
c) exponential growth
d) per capita growth