Acountry's population in 1990 was 242 million, in 1999 it was 244 million. estimate the population in 2013

247.12 million

Step-by-step explanation:

Given:

In 1990, population=242 million

In 1999, population=244 million

estimated population in 2013=?

Estimated growth is calculated by:

P(t)= Po*e^(kt)

where Po is original population

k is growth rate

t is the time in year

Now putting the values of Po=242, P(t)=244, t=9 (t=1999-1990=9) we have:

244=242e^(9k)

(244/242)=e^(9k)

ln(244/242)=9k

k=1/9ln(244/242)

k=0.00091

Now Putting k=0.00091, Po=242, and t=23 (t=2013-1990=23) we have:

P(t)=242e^(23*0.00091‬)

P(t)=247.12 million

the population in 2013 estimated to be 247.12 million!

6,250

step-by-step explanation:

to get the area, multiply 360 by 160.(57,600)

to find out how many bags of fertilizer it will take, first figure out how many square feet one bag can hold. divide 1000 by 8(125) to get the unit rate(how many square feet one pound of fertilizer can hold)and multiply it by 50(6250). if i haven't made a mistake, that is the answer.

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!