lump sum and flies

[jb-magic]

[h=1]The number of flies is proportional to the 5th root of years. If you have 150 flies in 5 years, how many flies are there in 7 years?[/h]
A man has

a.) $3000 now, $4000 in 5 years, and $4000 in 10 years,
b.) lump sum

how much would the lump sum have to be for a and b to be equal?

 

[JeffM]

The number of flies is proportional to the 5th root of years. If you have 150 flies in 5 years, how many flies are there in 7 years?


A man has

a.) $3000 now, $4000 in 5 years, and $4000 in 10 years,
b.) lump sum

how much would the lump sum have to be for a and b to be equal?

For the first question, can you write out what the first question says mathematically?

With regard to the second question, "equal" in what sense? What is the exact question asked?

And why is this under calaculus?

 

[stapel]

The number of flies is proportional to the 5th root of years. If you have 150 flies in 5 years, how many flies are there in 7 years?

A man has

a.) $3000 now, $4000 in 5 years, and $4000 in 10 years,
b.) lump sum

how much would the lump sum have to be for a and b to be equal?

Are these two separate questions? If not, how (on earth?!?) are they related?

When you reply, please include a clear listing of your efforts so far, so we can "see" where you're having trouble. Thank you!