Answer:
A.
![\frac{\text{5.2 ft}}{\text{ inch}}](https://img.qammunity.org/2019/formulas/mathematics/middle-school/1crzkjjbxdyinsjzcdn5jdch9ph045ewzb.png)
Explanation:
We have been given that a model car is 2.5 inches long. The real car is 13 feet long. We are asked to find the unit rate that describes the relationship of the real car to the model car.
We know that unit rate is a ratio that is used to compare different kinds of quantities.
To find the unit rate, we will divide 13 feet by 2.5 inches.
![\text{Unit rate}=\frac{\text{13 ft}}{\text{2.5 inch}}](https://img.qammunity.org/2019/formulas/mathematics/middle-school/kcus40sa9znsu791zd8rk28wzslgdn0ojw.png)
![\text{Unit rate}=\frac{\text{5.2 ft}}{\text{ inch}}](https://img.qammunity.org/2019/formulas/mathematics/middle-school/5dqi286intnmcxry4nix3qc37h181nrjsj.png)
Therefore, the unit rate of for our given relation is
and option A is the correct choice.