Balancing the books

How many visitors does a tourist attraction need next week in order to break even?
Exploring and noticing Working systematically Conjecturing and generalising Visualising and representing Reasoning, convincing and proving
Being curious Being resourceful Being resilient Being collaborative

Problem



A tourist attraction, which opens every day, needs 30 000 visitors per day on average to break even.

Last week there were 120 000 visitors.

What is the number of visitors needed this week to break even over the two-week period?