What is the largest number of islands, each with two bridges attached to it, that you can get to every other island by crossing only two bridges?

Need on this geometry question. explain how you did it.

Kayla made observations about the sellin price of a new brand of coffee that sold in the three different sized bags she recorded those observations in the following table 6 is $2.10 8 is $2.80 and 16 is to $5.60 use the relationship to predict the cost of a 20oz bag of coffee.

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.