26.315789, you should use a caculator
The wrong statement: The volume or the smaller cone cannot be determined because its height is unknown.
We already know that the larger cone has a height of 8 cm and that the smaller cone is just 1/4 of 8 cm.
8×1/4 = 2 cm.
You can still find its volume by using the formula 1/3πr^2.
1 thousand and 1 hundred means 1100.
In scientific notation, it's 1.1*10^3