Answer:
The number of additional streetlights installed every week is 2, and this will continue for 52 weeks. Therefore, the total number of streetlights added during this period will be:
2 streetlights/week x 52 weeks = 104 streetlights
If the city currently has 138 streetlights, then after 30 weeks, the total number of streetlights will be:
138 streetlights + 2 streetlights/week x 30 weeks = 198 streetlights
Therefore, the city will have 198 streetlights at the end of 30 weeks.
Explanation:
1. The problem states that the city currently has 138 streetlights.
2. The city council has decided to install 2 additional streetlights at the end of each week for the next 52 weeks. This means that every week, the city will add 2 streetlights to its total.
3. To find out how many streetlights will be added in total over the 52-week period, we can multiply the number of additional streetlights per week (2) by the number of weeks (52):
2 streetlights/week x 52 weeks = 104 streetlights
Therefore, over the 52-week period, the city will add 104 streetlights.
4. To find out how many streetlights the city will have at the end of 30 weeks, we need to calculate how many additional streetlights will be added during this time period. Since the city is adding 2 streetlights per week, we can multiply 2 by the number of weeks (30):
2 streetlights/week x 30 weeks = 60 streetlights
This means that over the course of 30 weeks, the city will add 60 streetlights.
5. To find out the total number of streetlights at the end of 30 weeks, we need to add the current number of streetlights to the number of streetlights added during the 30-week period. Therefore, we can add 138 (the current number of streetlights) and 60 (the number of streetlights added during the 30-week period):
138 streetlights + 60 streetlights = 198 streetlights
Therefore, the city will have 198 streetlights at the end of 30 weeks.