Answer:
by the -16 did you mean to put a + sign or is that a t
Answer: 
Step-by-step explanation:
Given
Time is extended from 28 days to 76 days
The percentage increase is given by

Putting values

Thus, the percentage increase in time is 
Add all the numbers up but pay attention you are counting 6.30 twice. then you divide by the numbers of days you have.(5)
<span>Your answer should be 5.47</span>
Here is the answers to your question
Its A or C Because you cannot have 6/5