Arthur is playing in his room, which is 24.3 feet above ground. He then descends 39.9 feet to the basement, where his uncle is working in his workshop. If ground zero is 0 feet, which number best describes the location of the basement woodshop?
(1 point)
Responses
-64.2 feet
-64.2 feet
-15.6 feet
-15.6 feet
15.6 feet
15.6 feet
64.2 feet