Final answer:
The nurse should report a respiratory rate of 45/min to the healthcare provider.
Step-by-step explanation:
The nurse should report the respiratory rate of 45/min to the healthcare provider. A respiratory rate of 45/min in a 3-year-old toddler is higher than the normal range, which is usually between 20-30 breaths per minute. This increased respiratory rate may be indicative of an underlying respiratory problem or illness and should be evaluated by a healthcare professional.