Final answer:
After taping two pieces of paper each measuring 34.85 cm and cutting off 14.91 cm, the resultant length of the paper is 54.79 cm. Centimeters are the suitable metric measurement for the length of a piece of paper, while millimeters are used for more precise measurements.
Step-by-step explanation:
To find out how long the paper is after taping two pieces together and then cutting a portion off, you first add the lengths of the two original pieces of paper. Each piece measures 34.85 cm, so you would calculate:
34.85 cm + 34.85 cm = 69.70 cm
After taping them together, you have a length of 69.70 cm. Then you cut off 14.91 cm, so you subtract this number from the total length:
69.70 cm - 14.91 cm = 54.79 cm
Therefore, the length of the paper after cutting it is 54.79 cm.