The population of a city is growing at an average rate
of 3% per year. in 1990, the population was 45 000.
a) write an equation that models the growth of the
city. explain what each part of the equation
represents.
b) use your equation to determine the population
of the city in 2007.
c) determine the year during which the population
will have doubled.
d) suppose the population took only 10 years to
double. what growth rate would be required for
this to have happened?

answer set (b) 0.5, 3/4 80% is in order from least to greatest.  

step-by-step explanation:

in order to compare rational numbers to each other, it is much easier if they are in the same form.   typically, the best form in which to evaluate rational numbers is in decimals.   in order to convert a percent to a decimal, you would divide the given percentage by 100.   you can also accomplish the conversion by moving the decimal point over two places to the left.   for example, the decimal value of 80% is 80/100, or 0.8.   in order to convert a fraction to a decimal, you need to divide the numerator by the denominator.   for example, 3/4 is 0.75.   so, for choice (b) 0.5 3/4 (0.75), 80% (0.8) is the only choice in which the numbers are in order from least to greatest.  

the anwser is d) 75°

step-by-step explanation: