Given:
Toilet rolls com in packs of 4 and 9.
4-pack is priced at £2.04.
9-pack is priced at £4.68.
To find:
The pack that has better value by calculating the price per roll.
Solution:
We have, the 4-pack is priced at £2.04.
So, the price per roll for this pack is:

In the pack of 4 rolls the price per roll is £0.51.
It is given that, the 9-pack is priced at £4.68.
So, the price per roll for this pack is:

In the pack of 9 rolls the price per roll is £0.52.
Since the price per roll in the pack of 4 rolls is less that the price per roll in the pack of 9 rolls because 0.51 < 0.52, therefore the pack of 4 rolls has better value.
Answer:
1.048576e+46
Step-by-step explanation:
(5x5)x20x80 to the power of 10
(25x20)x80 to the power of 10
500x80 to the power of 10
40000 to the power of 10
the answer is 1.048576e+46
You will have to take 3x common from both terms and your ans should look like this,
3x(9x^2-4)
The amount of kilograms he weighs I think is 57.6062994983