Why was an attack against vicksburg by river just not possible for union forces?

Which of the following correctly describes a repurchase agreement? the sale of a security with a commitment to repurchase the same security at a specified future date and a designated price. the sale of a security with a commitment to repurchase the same security at a future date left unspecified, at a designated price. the purchase of a security with a commitment to purchase more of the same security at a specified future date.

On a production possibility curve, data points that fall outside of the curve represent what

The most heavily populated areas of africa are found