First to help me with this gets the brainliest

Match each expression with its simplified form.

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?

In a timed typing test lara typed 63 words per minute. estimate the number of words she should be able to type in half in hour show your work