A landscaper estimates that a set of plants can be installed in 6 hours by 12 workers. The landscaper wants to finish a set of plants in 4 hours. Assuming that the variables are inversely related, how many workers should the landscaper bring to the job?

For an inverse relationship, the number of workers multiplied by the time stays constant. The job requires 12 × 6 = 72 worker-hours, so finishing in 4 hours requires 72 ÷ 4 = 18 workers. The landscaper should bring 18 workers, choice C.

AI-written and checked against the verified answer.