Question

Andalusia has been promoting the importance of health maintenance. from january 1,1991 to january 1,1993, the number of people enrolled in health maintenance organizations increased by 15 percent. the enrollment on january 1,1993 was 45 million. how many million people(to the nearest million) was enrolled in health maintenance organizations on january 1,1991?

Answer 1

on January 1,1993 no. of people increased to 115% which is 45 million

so, no. of people enrolled in jan 1 1991 was 45*(100/115) = 39.13 million which is nearest to 39 million

so answer => 39 million

Answer 2

Answer: There are 34 millions was enrolled in health maintenance organization on January 1, 1991.

Step-by-step explanation:

Since we have given that

Population in January 1, 1993 = 45 millions

Rate of growth = 15%

We need to find the number of population in January 1, 1991.

So, we can write it as :

$45=x(1+\dfrac{15}{100})^2\\\\45=x(1+\dfrac{3}{20})^2\\\\45=x(\dfrac{23}{20})^2\\\\x=\dfrac{45\times 20\times 20}{23\times 23}\\\\x=34\ millions$

Hence, there are 34 millions was enrolled in health maintenance organization on January 1, 1991.