Answer:
the last one 
Step-by-step explanation:
8hrs = 480mins
6hrs = 360 mins
472/480 = 0.983...
0.983... x 360 = 354
D) 354
Tina would have completed 5 shirts as 80÷8 is 10 and if you split ten shirts between the 2 of them, they each complete 5 shirts