6.8/5 = 1.36
1.36 x 8 = 10.88
This means that the cost of an adult is $10.88
Answer:

Step-by-step explanation:
Multiply the two polynomials by multiplying each term

Try glucose (C6H1206) and water (H2O)?
Answer:
78%
Step-by-step explanation:
% increase = Increase ÷ Original Number × 100
% increase= 35.8/46 *100= 77.82=78 %
The mean that the library and calculated is not correct. Her mistake was she divided 55 by 8 instead of dividing by 10.
Please see the attached picture for the work in finding the correct mean of 5.5 books.