Carol has a collection of 100 stamps. the graph below shows the percentage of stamps she has from each country.

how many more of carol's stamps are from italy than from england?
a. 22
b. 25
c. 47
d. 3

David estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x. create a question you could ask that could be answered only by graphing or using a logarithm.