Jodi and Vance are researching on a deserted island and have to stay on the island for a certain number of weeks to carry out their research. On their first expedition, they stayed for three weeks on the island. They spent two weeks more on the second expedition than they spent on their first expedition. They spent twice as many weeks on their last expedition as they spent on their second expedition. Calculate the total number of days they spent on the island on all the trips.
How many weeks did they spend on the island on the second expedition? ** If they spent two more weeks on their second research expedition than they spent on the first week, they spent 2+3 = <<2+3=5>>5 weeks on the island.
How many weeks did they spend on the island on the two expedys? ** In the two expeditions, they stayed on the island for a total of 5+3 = <<5+3=8>>8 weeks.
How many weeks did they spend on the island on the third expedition? ** On their third expedition, they spent twice as many weeks as they spent on the second week on the island, which is 2*5 = <<2*5=10>>10 weeks.
How many weeks did they spend on the island on all the trips? ** In all three expeditions, they stayed on the island for 10+8 = <<10+8=18>>18 weeks.
How many days did they spend on the island on all the trips? ** Since a week has seven days, they spent 18*7 = <<18*7=126>>126 days on the island.
#### 126