The population of the world is doubling every 35 a. In 1987 the total population reached 5 billion. find the projected world population for the year 2001.

USE THE EXPONENTIAL GROWTH FORMULA.

y=y_o(e)^(kt)

35a=5e^(1987t)

ln7a/1987=k

y=5e^[(ln7a/1987)(2001)]

=35.6

this is wrong, the answer is 6.6 billion