Final answer:
To find the number of swimmers when the ratio of swimmers to swim instructors is 8 to 1, and there are 13 swim instructors, you multiply 13 by 8, resulting in 104 swimmers.
Step-by-step explanation:
The question asks us to calculate the number of swimmers there are if the ratio of swimmers to swim instructors is 8 to 1 and there are 13 swim instructors. To find the number of swimmers, you multiply the number of instructors by the ratio of swimmers to instructors. In this case, it would be 13 instructors × 8 swimmers/instructor.
13 instructors × 8 swimmers/instructor = 104 swimmers
Therefore, if there are 13 swim instructors, there would be 104 swimmers.