Does anyone know how to do this i am not sure how to solve this !

What percent of the circle below is shaded?

The function f(x) = 14,600(1.1)* represents the population of a town x years after it was established. what was the original population of the town?

At the county fair, the baxter family bought 6 hot dogs and 4 juice drinks for $12.90. the farley family bought 3 hot dogs and 4 juice drinks for $8.55. find the price of a hot dog and the price of a juice drink.