Will a vector at 45 degrees to the horizontal be larger or smaller than its horizontal and vertical components? by how much?

Larger. How big depends on the size of the vector. But think about pythagoras theorem to solve for the vector.

When you go to ask a qustion there will be a picture of a paper clip looking thing and then it will pop up your files and you click on the imajes and then you up load it

Because the sun is the biggest and if the sun orbits the earth we will be dead probably