a christmas tree is supported by a wire that is 3 meters longer than the hight of the tree. the wire is anchored at a point whose distance from the base of the tree is 21 meters shorter than the height of the tree. what is the height of the tree​

There are a total sales of 2,000 dollars on monday on tuesday sales dropped 10% on wednesday sales dropped another 20% compared with tuesday from wednesday to thursday sales increases by an equal amount to 25% of monday total sales what is the net change in dollars on total sales from monday to tuesday