Question: tourists arrive at a security checkpoint at the rate of...

Tourists arrive at a security checkpoint at the rate of 35per hour. The checkpoint has a single machine that scans all tourists wanting to enter the secure area. Tourists are scanned one at a time according to a​ first-come first-served discipline. A constant 80 seconds are required to scan a tourist.

a. The scanning machine is busy % of the time. ​(Enter your response rounded to one decimal​ place.)