How many millimeters are in 15 centimeters

What is the equation of a line passing through the point (6,1) and parallel to the line whose equation 3x=2y+4

Write the expression 7x^3-28xy^2 as the product of 3 factors

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?