10) On Tuesday Imani bought eight hats. On Wednesday half of all the hats that she had
were destroyed. On Thursday there were
only 21 left. How many did she have on
Monday?

Classify the following triangle check all that apply

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?