Answer:
500
Explanation:
You want to know the rate in 4 years if it is 380 units per day, and increasing by 30 units per day per year.
Rate
The rate in 4 years will be the sum of the current rate and the amount of increase. The amount of increase is the rate of increase, multiplied by time:
amount of increase = (30 units/day)/year × (4 years) = 120 units/day
Then the rate in 4 years will be ...
new rate = current rate + increase
new rate = 380 units/day + 120 units/day = 500 units/day
The company will be producing 500 units per day in 4 years.