Please help I have been stuck on this for five minute and I want to have a good grade on my report card. :(

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?

What is the slope of any line parallel to the line 8x+9y=3 in the standard (x,y) coordinate plane?

How many significant figures are there in the number 10.76?