Where do the parentheses go in the problem 6+9÷3+6-4×2 ; 29

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?

If a is a nonzero real number then the reciprocal of a is

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122