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Natalija [7]
3 years ago
15

A gallon of milks sells for $3.18 and a quart of milk sells for $0.76. Which item has the better unit price? Justify your answer

using two different methods.
Mathematics
1 answer:
nataly862011 [7]3 years ago
3 0

Answer:

Second\ price\ that\ is\ 1\ quart\ milk=\$0.76\ has\ better\ unit\ price

Step-by-step explanation:

Use gallon unit:

<u><em>First Price:</em></u>

1\ gallon\ milk=\$3.18\\\\

<em><u>Second Price:</u></em>

<em><u /></em>4\ quart=1\ gallon\\\\1\ quart\milk=\$0.76\\\\4\ quart\ milk=4\times 0.76=\$3.04\\\\\Rightarrow 1\ gallon\ milk=\$3.04<em><u /></em>

<em><u /></em>

<em><u /></em>1\ gallon\ at\ first\ price\ is\ greater\ than\ the\ rate\ of\ 1\ gallon\ at\ second\ price\\\\Hence\ 1\ quart=\$0.76\ has\ the\ better\ unit\ price.<em><u /></em>

<em><u /></em>

Second Method: Use Quart Unit:

<u><em>First Price:</em></u>

1\ gallon=4\ quart\\\\1\ gallon\ milk=\$3.18\\\\4\ quart\ milk=\$3.18\\\\1\ quart\ milk=\frac{3.18}{4}=\$0.795

<u><em>Second Price:</em></u>

<u><em /></u>1\ quart\ milk=\$0.76<u><em /></u>

<u><em /></u>

<u><em /></u>Second\ price\ that\ is\ 1\ quart\ milk=\$0.76\ has\ better\ unit\ price<u><em /></u>

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