Answer:
The duties under the teaching contract cannot be delegated
Explanation:
The person wit whom the school has a binding agreement was Teresa and contract of services cannot be delegated unilaterally by Teresa to her friend Shirley without consulting the school authority.
The appropriate procedure would be for Teresa to discuss with the school her plans to let Teresa to cover up for her absence,however, if the school accepts the new arrangement , Teresa would need to be relieved of her duties as this would be a permanent substitution.
Answer:
d.the company is precisely breaking even.
Explanation:
Margin of safety is referred to current sales - Break even sales ratio to current sales as a percentage.
Basically it is quoted as follows:

Therefore, when the current sales = Break even sales then only the company will have margin of safety = 0
Thus, at 0 margin of safety the company basically is at no profit no loss situation, that is break even.
Answer:
The correct answer is the third option: Is the product already offered by competing firms?
Explanation:
To begin with, if the a company is looking forward to measure the success of a new product by asking three fundamental questions then the most important ones are those that implicates the satisfaction of the consumers and of the managers that work in the financial area due to the fact that they are the ones who make all the calculates and decide in what to invest, therefore that the success of the product will be achieved if it satisfies the technical requirements of the clients, if it is consider viable and valuable and if the sales were good enough to satify the producer's financial requirements.