A toy car is placed at 0 on a number line. It moves 9 cm to the left, then 4 cm to the right, and then 6 cm to the left. The total distance the toy car traveled is cm.

19cm    

Explanation:

Total distance is the length of path covered by a body. It is different from displacement which is concerned with the start and finishing of a journey;

Given;

   From 0 mark

              9cm to the left

              4cm to the right

              6cm to the left      

                                                        0

                                                      start

                                  - - - - - - - - -

                                         9cm left

                                 - - - -

                                 4cm  right

                   - - - - - -      

                     6cm   left

Total distance  = 9cm + 4cm + 6cm  = 19cm              

the atomic mass is the bottom number on the element.

-steel jelly