3.a robot is on the surface of mars. the angle of depression from a camera in the robot to a rock on the surface of mars is 13.78°. the camera is 184.0 cm above the surface. how far is the camera from the rock? (round to the nearest tenth as needed.)

A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.