Answer:
![1.\ 12\ feet = 4\ yards](https://img.qammunity.org/2021/formulas/mathematics/middle-school/v63h3a9a9l9flg6bc6ju2nravcqt3v9ito.png)
![2.\ 4\ miles = 21120\ feet](https://img.qammunity.org/2021/formulas/mathematics/middle-school/ry1mr3zr7so070mdd7kugnqptrciwebiuk.png)
Explanation:
Given
12 feet = _____ yard
4 miles = ____ feet
To start with;
we need to understand the unit of conversion between the two measurements;
1. 12 feet = _____ yard
To convert from feet to yard;
![1\ foot = (1)/(3) yard](https://img.qammunity.org/2021/formulas/mathematics/middle-school/no9m3hfn8firggrr0rq242i3bbg3bw4z7i.png)
This implies that;
![12\ feet = 12 * (1)/(3) yard](https://img.qammunity.org/2021/formulas/mathematics/middle-school/2c6ji2aguzkk9vhd2c6qv6zfhxwecljeb4.png)
![12\ feet = (12)/(3) yard](https://img.qammunity.org/2021/formulas/mathematics/middle-school/hie09m74s9dlcplwo6boknue71emjrt0yx.png)
![12\ feet = 4\ yards](https://img.qammunity.org/2021/formulas/mathematics/middle-school/jvsspb3dnptybo2hsmqeiyb3x1t33qv8tq.png)
2. 4 miles = ____ feet
To convert from miles to feet;
![1\ mile = 5280\ feet](https://img.qammunity.org/2021/formulas/mathematics/middle-school/xfqvbbitpit18tn7dqp4mcmgu1ayamlw3o.png)
This implies that;
![4\ miles = 4 * 5280 feet](https://img.qammunity.org/2021/formulas/mathematics/middle-school/v1orc0ludwo6ptsdwbg13gwedvrdoqtbwy.png)
![4\ miles = 21120\ feet](https://img.qammunity.org/2021/formulas/mathematics/middle-school/9si6zj2qkc9akoo59kw936xxdjav9ss10w.png)