Can someone me with this? i need an explanation

Abouncy ball is dropped such that the height of its first bounce is 5.5 feet and each successive bounce is 64% of the previous bounce's height. what would be the height of the 7th bounce of the ball? round to the nearest tenth (if necessary).

Classify the following triangle check all that apply

To which set of numbers does the number –5 belong? select all that apply. integers natural numbers rational numbers real numbers whole numbers