Math  /  Numbers & Operations

QuestionFind the unit rate that helps you solve the problem. How many inches are in 1010 feet?
1010 feet × \times ______ = = ?? inches
1 inch12 feet\frac{1 \text{ inch}}{12 \text{ feet}}
1 foot12 inches\frac{1 \text{ foot}}{12 \text{ inches}}
12 inches1 foot\frac{12 \text{ inches}}{1 \text{ foot}}
12 feet1 inch\frac{12 \text{ feet}}{1 \text{ inch}}

Studdy Solution

STEP 1

What is this asking? We need to figure out how many inches are in 10 feet, and we're given a few conversion rates to choose from. Watch out! It's easy to pick the wrong conversion rate, so make sure the units cancel out correctly!

STEP 2

1. Choose the Right Conversion Rate
2. Calculate the Inches

STEP 3

Alright, let's **start** by looking at what we're given: $10\$10 feet.
We want to convert this to inches.
We need a conversion rate that will *cancel out* the feet and leave us with inches.

STEP 4

We have a few options.
Let's look at 12 inches1 foot\frac{12 \text{ inches}}{1 \text{ foot}}.
If we multiply our **starting value**, $10\$10 feet, by this, the "feet" units will divide to one, and we'll be left with inches!
That's exactly what we want!

STEP 5

The other options won't work.
For example, if we used 1 foot12 inches\frac{1 \text{ foot}}{12 \text{ inches}}, our units would be feet squared divided by inches... what?! That's not what we're looking for.
So, 12 inches1 foot\frac{12 \text{ inches}}{1 \text{ foot}} is our **winner**!

STEP 6

Now for the fun part!
We **multiply** our $10\$10 feet by our **chosen conversion rate**:
10 feet12 inches1 foot 10 \text{ feet} \cdot \frac{12 \text{ inches}}{1 \text{ foot}}

STEP 7

Notice how the "feet" units divide to one, leaving us with:
1012 inches 10 \cdot 12 \text{ inches}

STEP 8

And 101210 \cdot 12 is $120\$120!
So, our **final answer** is:
120 inches 120 \text{ inches}

STEP 9

There are $120\$120 inches in $10\$10 feet.

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