Respuesta :

Answer:

82/20 = 4.1

4.1 x 4 cm = 16.4 cm on her map

2) Original has a side of 5

enlarged has a side of 10

5 x ___ = 10

5 x 2 = 10

scale factor of 2 (last choice)

hope this helps :)

Step-by-step explanation:
to the second question, the scale factor is 2