Alatte in the u.s. costs $3.00. an identical latte in country x costs 60 casatas. the implied exchange rate between the two currencies is casatas per dollar. at this rate of exchange a good that costs $30 in the u.s. should be expected to cost casatas in country x.:

The exchange rate would be 20 casatas per 1 dollar.

A good that costs 30 dollars should be expected to cost 600 casatas.

Explanation:

We can establish a ratio between these two currencies (where dollars is the numerator and casatas the denominator):

If we divide both the numerator and denominator by three we get:

Therefore, the exchange rate would be 20 casatas per 1 dollar.

At this rate of exchange a good that costs $30 in the U.S. should be expected to cost:

To solve this we can make two ratios and solve using a rule of three:

Now we will solve for x:

Therefore it should be expected to cost 600 casatas.

C

Explanation:

The African plate sits under the European one, and since its sinking under land it would be sinking into rock, not the ocean, considering under the plate isn't hollow filled with water.