Final answer:
To find the total distance between points P and S with point R in between, add the lengths of PR (15.5mm) and RS (13.3mm) to get PS, which is 28.8mm.
Step-by-step explanation:
The student's question is asking for the total distance between points P and S, where point R is located in between them. To calculate the total distance PS between points P and S with R in between, you simply add the lengths of PR and RS together. The length of PR is given as 15.5mm, and RS is given as 13.3mm.
Here is the calculation:
PS = PR + RS
PS = 15.5mm + 13.3mm
PS = 28.8mm
Therefore, the total length of PS is 28.8mm, which is the distance from point P to point S through point R.