Question

a 80 cm tall sunflower increases its length by 5% per day during a sunny period.
a) how much growing sunflower in a week?

Answer 1

there is a method of successive % change which can be applied here.
But you will have to apply it 4 times as it is only valid for 2 quantities.
\[a +b +\frac{ ab }{ 100 }\]
Where a and b are percentages.

Answer 2

solve it plz :D ,

Answer 3

\[80(1.05)^7\]

Answer 4

The Better way is that you follow @satellite73, @sarmandi
His method is easy and quick.