I've always heard it to be a. schools, but I'm not sure if that's the name for the specific situation you described.
The Great Depression started in October 1929-39
Answer: difficulty in matching qualified workers with available jobs.
Explanation: structural unemployment is a result of skill gap. Technological advancement is the major reason for structural unemployment because it makes the skills of many workers out of date. Further education and training to meet up with latest technlogical trends is the solution to structural unemployment.
Answer: Yes. Marit's note is a demand note.
Explanation: basically, in finance, a demand note is "A note that normally has NO DATE for repayment, but is due on demand of the lender. Usually the lender will only give the borrower a few days notice before the payment is due."
In essence, a demand note, only has to state payable on demand.
If no time for payment is specified, then the payment is also payable on demand. Here, the note required installments but did not state a date for their payments.