Answer:
73 minutes
Step-by-step explanation:
Find a pattern in the sequence.
The sequence is 18, 29, 40, 51.
29 - 18 = 11
40 - 29 = 11
51 - 40 = 11
The pattern is add 11 each day.
If 51 is Thursday, 51 + 11 is Friday.
51 + 11 + 11 is Saturday.
51 + 11 + 11 = 73
Therefore Trent will lift weights for 73 minutes.