Apples are 0.99 lb someone buys 8.9 pounds of apples and has 10dollors how much will she get back

How can we find the measure of an exterior angle if we know the measurement of an interior angle

What percent of the circle below is shaded?

Three baby penguins and their father were sitting on an iceberg 0.50.50, point, 5 meters above the surface of the water. the father dove down 4.74.74, point, 7 meters from the iceberg into the water to catch dinner for his kids. what is the father penguin's position relative to the surface of the water?