A leprechaun places a magic penny under a​ girl's pillow. The next night there are 2 magic pennies under her pillow. Each night the number of magic pennies doubles. How much money will the girl have after 21 ​nights?

Respuesta :

Phew, the girl will have, drum roll please!!!
1,048,576 million dollars. Wow, I wish this leprechaun could come to me for once.