The agile team has sized the features for the release with a total of 45 story points. Given the team's velocity of 10 story points per sprint, it would take 4.5 sprints to complete the release. Since a sprint is a discrete unit and cannot be halved, the team will need 5 sprints to complete all features. However, if the team can slightly increase their velocity or if there is any carry-over capacity, they might be able to fit the work into 4 sprints.
: = This calculation is based on standard agile practices, which are not explicitly detailed in the PMBOK Guide but are part of the agile methodologies that the guide acknowledges. The PMI-ACP (Agile Certified Practitioner) also covers these practices, which align with the principles of agile project management.