Riddle: What is always in front of you but can't be seen? 1. 234 000 000 000 A. 0.5 x 104 U. 2.34 x 10" 2. 123 500 T. 1.235 x 105 E. 3.4 x 10- 3. 0.000 34 4. 0.000 002 54 F. 2.54 x 10-6 R. 5 X 10' 5. 5 000 Letter Item Number 1 3 1 3 RUBRIC Score Description 10 Steps and solution have no mathematical errors. 7 Steps and solution have no mathematical errors, but one steps are not completed 5 Steps and solution have no mathematical errors, but two steps are not completed Steps and solution have no mathematical errors, but several steps are not completed. 1 No attempt is made to create an output.​