What is 247,394,677 to nearest million

Which of the following describes the symmetry of the graph of y = x3?

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?

Write an inequality for this sentence the quotient of a number and -5 increased by 4 is at most 8