Question

An island has no currency; it instead has the following exchange rate:

50 bananas = 20 coconuts
30 coconuts = 12 fish
100 fish = 1 hammock

How many bananas equal 1 hammock?

Answer 1

1 hammock = 100 fish
= 100(30/20 coconuts
= 100(30/12)(50/20 bananas
= 625 bananas

Answer 2

to save money for a video game, you put one dollar in an envelope. each day for 5 days you double the number of dollars in the envelope from the day before. how much have you saved after 5 days