Danny wants to capture a photograph of a wide, open field. he wants to use a wide depth of field to keep most of the landscape and sky in focus. what lens will he use?

a telephoto lens with a wide angle 14mm-20mm wide angle lens

Explanation:

coordinates of r(b,c)

slope of nm is 0.

step-by-step explanation:

the midpoint of the line joining the points (x₁,y₁) and (x₂,y₂) is given by

the midpoint of the line segment nk is given by

∴r(b,c)

the slope of the line joining the points (x₁,y₁) and (x₂,y₂) is given by

slope of rs is

hence

coordinates of r(b,c)

and slope of nm is 0.

i think eddy chen is better.