Which expression is equivalent to x^−4?   best answer will be marked brainlist a. x^−1+x^−3 b. x^−2⋅x^−2 c. x^2−x^6 d. x^−1⋅x^4

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?