How do i write 6 in scientific notation?

For the given quadratic equation convert into vertex form, find the vertex and find the value for x=6 y=-2x^2+2x+2

Quadrilateral wxyz is on a coordinate plane. segment yz is on the line x+y=7 and segment xw is on the line x+y=3. which statement proves how segments yz and xw are related

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.