A word problem

[mudfish]

Globe demand for oil is growing exponentially, described by the model y = 18.9e^.025t , where y = billions of barrels per years, and t = the number of years after 2003.
A) What will global demand be in 2010?
B) When will global demand reach 30 billion barrels?



Thanks for all the help.

[TheAlchemist]

This seems like a homework problem and if you've been on this forum long enoug you'll know that these are not readily appreciated.

But anyway...I have nothing better to do so:
a) in 2010: y = 18.9e^(0.025 x 7) = 18.9e^(0.175)

b) 30 = 18.9e^0.025t
then ln(30/18.9) = 0.025t
so therefore demand will reach this figure in:
[ln(30/18.9)/0.025] + 2003

[mudfish]

They are, but she wants me to check them for her! (my woman)
But I have not done any real math in 18 years! So I can not do the problem to check them for my women!

Thank for the help

[wossname]

This seems like a homework problem and if you've been on this forum long enoug you'll know that these are not readily appreciated.

But anyway...I have nothing better to do so

Cool your jets, you loose cannon! The mudmeister is allowed. I give permission.

Although he should get himself a decent graphic calculator Then he could do this himself.

[azteched]

No need for a *graphic* calculator..

[wossname]

They are infinitely better than non-graphic ones. I laugh in scorn at those not possessed of one.

[azteched]

Better to learn the maths