Final Answer:
The total mass after Fred leaves exceeds the lift's safe capacity, assuming a safe load limit isn't specified. Therefore the correct answer is B) No, it is not safe.
Step-by-step explanation:
The initial total mass of people in the lift is 565 kg to the nearest 5 kg. When Fred, with a mass of 88 kg to the nearest kg, exits the lift, the total mass decreases. To determine if the lift is safe, we need to account for the change in mass. 565 kg - 88 kg = 477 kg, which is the new total mass after Fred leaves.
As the lift's maximum capacity or safe load limit isn't specified, it's assumed that the safety is determined by the lift's maximum load capacity. If the maximum safe load capacity is less than 477 kg, the lift is not safe to use. The lift's safety directly depends on its maximum load capacity. If the maximum load capacity is greater than or equal to the new total mass of 477 kg after Fred exits, then the lift is safe to use.
However, if the maximum load capacity is less than this value, the lift is not safe, as it would exceed its designed capacity. Therefore, considering only the change in mass due to Fred leaving, and without knowledge of the lift's specified maximum load capacity, it can be concluded that the lift is not safe for use after Fred exits due to exceeding its capacity. Therefore th ecorrect answer is B) No, it is not safe.