The error is if you add all of those times up it is equal to 7.55 minutes and that's more than 6
Answer:
2.33
Step-by-step explanation:
Plug "7/3" in your calculator and round to the nearest hundredth (by finding the hundredth's place, looking at the digit before it, and moving the hundredth's place up one value if you deciphering that the digit before is greater/equal to 5). If you need a terminating decimal, you need to round. If you don't need it as a terminating decimal, add a ling over the last digit where the decimal begins to repeat.
Answer:
w - 3.3 + -3.3 = 5.6 - 3.3
w = 2.3

As, 

=0.301029+0.845098+1.13943
=2.26007
=2.260(approximate)