Label each graph with the correct expression , im extremely stuck

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

Subscriptions to a popular fashion magazine have gone down by a consistent percentage each year and can be modeled by the function y = 42,000(0.96)t. what does the value 42,000 represent in the function?

Use the distributive law to multiply. 3(4x + 5y + 6)