The answer is 75. You can find this using the equation 9 = 0.12x and then dividing 9 by 0.12 or 12%.
8, 6, and 12.
To find this answer, just multiply the lengths of the line segments by the scale factor (in this case, it’s 4):
2 x 4 = 8
1.5 x 4 = 6
3 x 4 = 12
Are you sure you didn’t miss anything while writing the question?
Cause we have nothing to go off. Everybody types differently so there is no way for us to say how long he typed for, unless we were given aprox how many words he wrote in a minute or something