Answer:
Mickey Mouse invested $30,000
Explanation:
With a $100,000 investment, the amount invested from the ratio can be found by dividing 100,000 by the ratio value.
So, in a ratio of 7:3, it will be split into 70,000 and 30,000.
This means that Mrs. Quinlan invested $70,000 and that Mickey Mouse invested $30,000.
So, Mickey Mouse invested $30,000
