Its a because you will add 1.25 and 0.75 because it says each and of course 18 would be what it equals
.0000914
Since it is negative you go behind the .
so you would go 5 spaces behind the point
Step-by-step explanation:
4-1-2-3-4-6-910191944
9^-2 = 1/81 or 0.0123
When there is a negative in front of the exponent it makes a fraction. It is usually just 1/the number it equals if it were positive.
