Westonci.ca connects you with experts who provide insightful answers to your questions. Join us today and start learning! Discover in-depth solutions to your questions from a wide range of experts on our user-friendly Q&A platform. Our platform offers a seamless experience for finding reliable answers from a network of knowledgeable professionals.

In t hours, a worker makes Q(t)=-t³+9t²+51t items. Find the time at which the worker's efficiency is maximum.