Use the formula to predict when the rice weevil population will reach 1,000,000,000

Question

anonymous · Answer

attachment

superdavesuper · Answer

good job on the first 2 parts of the Q....the last part is easy - just put y=1000000000 n solve for x....

wolf1728 · Answer

The formula should be
Population = 400 * (1.5)^weeks

superdavesuper · Answer

@wolf1728  thanx i didnt read the Q close enough...

anonymous · Answer

like this ?

wolf1728 · Answer

When will it reach a million?

Population = 400 * (1.5)^weeks
1,000,000 = 400 * (1.5)^weeks

1,000,000 / 400 = (1.5)^weeks

Now, we'll need to use logarithms:
log (1,000,000/400) = weeks * log (1.5)
3.3979400087 = weeks * 0.1760912591
weeks = 3.3979400087 / 0.1760912591
weeks = 19.2964717664

Yes, it's just that "simple"
LOL

wolf1728 · Answer

Katrina your calculation for 10 weeks is correct !!

wolf1728 · Answer

Superdave
That's okay.  When it comes to these whacky, exponential, logarithmic questions, I just happen to be pretty good (lucky even?) at them.