[ENEM 2025 Belém] 168 📘 ÁLGEBRA Um engenheiro é responsável por acompanhar o processo de controle de

[168] An engineer is responsible for monitoring the production control process of a screw factory. This process is considered under control if the length C of the screws satisfies M – 3d ≤ C ≤ M + 3d, where M is the average length and d is the standard deviation of the screw lengths. In the last data collection in which the process was considered under control, M = 5.0 cm and d = 1.2 cm were obtained. With the arrival of a new machine, the variability of the screw lengths was reduced, and the process was considered under control. The average length of the screws produced by this new machine was 5.6 cm, and none of these screws had a length smaller than the minimum measurement, nor larger than the maximum measurement of the screws produced by the previous machine. The standard deviation, in centimeters, for the new interval should be, at most, ✅ SUPER [APOSTILA] PROF. CAJU: https://caju.tv/SuperApostila ✅ [Playlist] ENEM 2025 Belém: https://caju.tv/ENEM2025BEL ✅ [Playlist] ALGEBRA ENEM: https://caju.tv/AlgebraENEM ✅ [Subscribe] to the channel: https://caju.tv/yt ✅ [FREE] QUESTION PLATFORM: https://caju.tv/Plataforma ENEM BELÉM 2025 REG - Math Exam Solved by Prof. Caju. Question 168 from the Blue Exam - ENEM BELÉM 2025 REG ------------------------------------ Want to contribute to maintaining my work of sharing knowledge throughout Brazil? https://caju.tv/contribuir Follow me on Instagram: @prof.caju   / prof.caju   ------------------------------------ #ENEMBELÉM2025REG #MatematicaENEM #ENEM