Final answer:
Robert spent 2.75 hours on his homework for Monday and Tuesday. The amount of time spent on Wednesday cannot be determined without additional information.
Step-by-step explanation:
The student's question is about calculating the total number of hours Robert spent on his homework over the course of three days. On Monday, he took 2 hours; on Tuesday, 0.75 hours; and on Wednesday, there was a typo in the original question - it should specify a fraction or number for Wednesday's time. Given this, we can only add Monday and Tuesday's times. Wednesday's time cannot be added until the exact amount is provided.
The total number of hours calculated thus far would be 2 + 0.75 = 2.75 hours. To find the complete total, the amount of time spent on homework on Wednesday would need to be added to this total.