Answer:
7
Explanation:
The area for a parallelogram is given by the following formula:
![A=bh](https://img.qammunity.org/2021/formulas/mathematics/high-school/qu2hlsd4h6dsol8g456d6dwuk4nd06d6gz.png)
Where b is the base and h is the height.
We already know the area is 28 and the height is 4. So, substitute:
![28=4b](https://img.qammunity.org/2021/formulas/mathematics/college/hkjd5jc68o3qj58jrltcgx2kte3r4zj38s.png)
Divide both sides by 4:
![b=7](https://img.qammunity.org/2021/formulas/mathematics/middle-school/ne5befo14isnkmqwwbqksnx0zskophirz2.png)
So, the base length is 7.
Our answer is 7 :)