The last one is the good one.
The point slope formula is,

Where,

And,


So,

I THINK THE ANSWER WOULD BE 2A\a+b=h
Answer:
1)- Variable utilities cost per machine hour = 1.6 per machine hour
2)- Fixed cost = 1740
3)-Total cost on 1220 Machine hour will be
= 3692
Step-by-step explanation:
1) CALCULATE VARIABLE UTILITIES COST PER MACHINE HOUR :
Variable utilities cost per machine hour = Change in cost/high machine hour-low machine hour
=4076-3388/1460-1030
Variable utilities cost per machine hour = 1.6 per machine hour
2) Fixed cost = Total cost-variable cost
= 3388-(1030*1.6)
Fixed cost = 1740
3) Total cost on 1220 Machine hour will be (1220*1.6+1740) = 3692
The 7 is in the thousands place, the 8 is in the hundreds place, the 5 is in the tens place, the 2 to the left side if re decimal point is in the ones place, the 2 to the right side of the decimal point is in the tenths place, the 0 is in the hundredths place, and the 9 is in the thousandths place.