Question

I WILL GIVE YOU A MEDEL IF YOU CAN ANSWER THIS QUESTION Becca's family has 4 gallons of milk. They drink 5/8 gallon per day. How long will their milk last?



A.

2 1/2days




B.

4 days




C.

4 5/8days




D.

6 2/5days

Answer 1

♫let it go, let it go, ...♫

Answer 2

@wolfe8 @mathmale :D

Answer 3

D is the answer

Answer 4

D

Answer 5

You will divide 4 with 5/8

Answer 6

Sometimes using units of measurement makes a problem (and its answer) a lot clearer. We know that the family consumes 5/8 gallon per day of milk. This can be written as \[\frac{ 5 gal }{ 1 day }\]
This is called a "rate" (here, it's the milk consumption rate).
The family starts out with 4 gallons of milk.
We are to determine how long that milk will last.

Obviously, the answer must be in days, not in gallons or consumption rates.

Writing

Answer 7

@mathmale Typo: \[\frac{\frac{5}{8}gal}{1 day}\] is the rate.

Answer 8

\[4 gal \times \frac{1day}{\frac{5}{8}gal} = \frac{4gal \times 1 day}{\frac{5}{8}gal} = \frac{4}{\frac{5}{8}}days\]

Answer 9

gallon units cancel when multiplying across

Answer 10

Nice work, @osx! Glad you caught my typo.