Answer:
after a hour we need 53 to scan
Step-by-step explanation:
given data
currently scanning = 947 a hour
target = 1,000
to find out
how many items do you need to scan a hour
solution
we currently scanning 947 a hours
and our target is 1000
so remaining item left is
remaining item = target - currently scanning
remaining item = 1000 - 947
remaining item = 53
so after a hour we need 53 to scan