How are a series and parallel car different?

Hybrids that use a series drive train only receive mechanical power from the electric motor which is run by either battery or a gasoline powered generator, series/Parell drive trains enable the engine an electronica motor to provide power independently or in conjunction with another. This is the answer

  concave means having an outline or surface that curves inward like the interior of a circle or sphere. so the mirror curves inward.

Iassume the answer is 75 feet. inwards to outwards rather than outwards to inwards. probably be 75.hachures are stokes drawn in direction of the steepest slope. a series of short parallel lines drawn on a map to indicate topographic relief. it is actually called hachures on contour lines. the small marks in the center of the feature are called hachures.observe the picture attached