Answer:
1.86 x 104
Step-by-step explanation:
This mathematical operation is a multiplication, so:
1.- Multiply the number as usual: 6 x 3.1 = 18.6
2.- Multiply the coefficients, remember since they coefficients, a multiplication, actually you need to add them: 4 + (-1) = 3+
3.- Then you write the number with the coefficient: 18.6 x 103
4.- In this case since the scientific notation just admit one number will be:
1.86 x 104