Question

Any ideas please anybody?

Answer 1

Answer:

Upper bound:  7.85

Lower bound:  7.75

Step-by-step explanation:

7.8 is the value that is rounded to one decimal place.  

To find the upper and lower bounds, add and subtract one from the decimal place.  You should get 7.7 and 7.9.

Then pick the number directly in between 7.7 and 7.8  and  7.8 and 7.9.  You should get 7.75 and 7.85.