A store had 250 bottles of water. Each week, 40% of the bottles were sold and 48 new bottles arrived in shipments. Which recursive function best represents the number of bottles of water in the store, given that f(0) = 250?

f(n) = f(n - 1) • 0.6 + 48, n 0

f(n) = 250 - f(n - 1) • 0.4 + 48, n 0

f(n) = f(n - 1) • 0.4 + 48, n 0

f(n) = 250 - f(n - 1) • 0.6 + 48, n 0

Question

A store had 250 bottles of water. Each week, 40% of the bottles were sold and 48 new bottles arrived in shipments. Which recursive function best represents the number of bottles of water in the store, given that f(0) = 250?

f(n) = f(n - 1) • 0.6 + 48, n > 0

f(n) = 250 - f(n - 1) • 0.4 + 48, n > 0

f(n) = f(n - 1) • 0.4 + 48, n > 0

f(n) = 250 - f(n - 1) • 0.6 + 48, n > 0

anonymous · Answer

@welshfella

welshfella · Answer

if 40% were sold then that left 60% in stock

elonasushchik · Answer

YES it would

welshfella · Answer

No because this is the formula for bottles in stock - thats 60% (0.60)  not 40% (0.4)

anonymous · Answer

Which one would you have said it is @welshfella ?

welshfella · Answer

right - so which one is left?

anonymous · Answer

It can't be B. It won't make sense, since C is 42 I would figure that it is C.

welshfella · Answer

you start with 250 and at end first week 40% are gone but 48 have been added  
so?

anonymous · Answer

Okay.

welshfella · Answer

guess i'm tired - I'm a little confused with this now....

anonymous · Answer

I submitted my work and put C and it was right, but thanks for helping!

welshfella · Answer

you start with 250 and at end first week 40% are gone but 48 have been added  
so?

welshfella · Answer

yw - not sure i have helped!

anonymous · Answer

You did, thanks!

welshfella · Answer

ok yw