Aleprechaun 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 19 nights?

The girl will have $5242.88 after 19 nights.

Step-by-step explanation:

We know that exponential equation is given by :_

               (1)

, where A= initial amount

b= Multiplicative rate of growth

x= Time period.

Given : A leprechaun places a magic penny under a girl's pillow. the next night there are 2 magic pennies under her pillow.

i.e. A= 1

Each night the number of magic pennies doubles.

i.e. b= 2

Put value of A and b in (1), we get

Put x= 19 , we get

Hence, the number of pennies the girl will get after 19 nights = 524288

Since 1 dollar = 100 pennies

⇒ 1 penny = 0.01 dollar [Using unitary method , we divide both sides by 100]

⇒ Total money in dollars =

Hence, the girl will have $5242.88 after 19 nights.

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

happy to

pls mark as brainliest.