Answer:
The quantity that Sarah's Machinery Company is indifferent between two technologies is 5.
Explanation:
We are looking for the quantity that Sarah's Machinery Company is indifferent between two technologies, so we have to find the quantity that the total cost with technology A is the same to the total cost with technology B
Total cost technology A=500+50x
Total cost technology B=250+100x
500+50x=250+100x
500-250=100x-50x
250=50x
x=250/50=5