Michael has decided to plant grapes in the garden behind his house. his neighbor vincent has grown grapes successfully for a long time and has given michael advice about how to plant vines. vincent told him to plant them three meters apart in rows that are three meters apart. he also told him to leave at least three meters between each vine and the edge of the garden. michael has measured the size of his garden and learned that it’s a rectangle with sides of 25 meters and 35 meters. how many vines should michael buy?