Exchange rates help you to know . when it is best to travel

how much your currency is worth in another currency

what other economies think of your money

when to exchange your money

B

Step-by-step explanation:

how much your currency is worth in a different currency

hope this helps <3

you are playing an adventure game on your computer. you come across a troll who won't let you pass and there is no other way to get to the other side of the river except over the bridge he is guarding.

the troll is a nerd. he takes great delight in watching people struggle with his problems. very few get them. he only gives you one chance and then he changes the puzzle. you have to solve this one.

before you are four blocks. they are numbered 11,6, -7,21.

he tells that the answer he wants is minus and between -1 and - 2. you can use +, -, ×, ÷   ( and ) as many times as you like or no times at all. you don't like the way he's looking at you, but you need to cross the bridge. what do you do?

6 cars because if you have 8 and subtract 2 youll have 6 left over