What is 7.8 billion in scientific notation

In the figure dhg fhe which statement is true by cpctc

When a rectangle is dilated, how do the perimeter and area of the rectangle change?

Which shows the correct lengths of side c in both scales? scale 1: 45 m; scale 2: 60 m scale 1: 60 m; scale 2: 45 m scale 1: 36 m; scale 2: 27 m scale 1: 27 m; scale 2: 36 m mark this and return save and exit