Which of the following is not a component of aggregate expenditure?

If additional units of a good could be produced at a constant opportunity cost, the production

possibilities frontier would be bowed outward (concave). Indicate whether the statement is true or false

If $1,000 is placed in an account earning 8% annually, the balance at the end of seven years will be

A) $1,080. B) $1,560. C) $2,000. D) $1,714.