Write a function g whose graph represents a horizontal stretch by a factor of 4 of the graph of f(x)=[x+3]

The functions f(x) and g(x) are shown in the graph f(x)=x^2 what is g(x) ?

What is perpendicular to y=-1/2x+11

Adolphin is swimming with her friend. the dolphin jumps to a height of 4.54.54, point, 5 meters above the surface of the water as her friend swims 9.89.89, point, 8 meters directly below her. what is the position of the dolphin's friend relative to the surface of the water? meters