What types of change in matter cannot be reversed

Which of the following is a consequence of the new “24-hour news cycle

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.

Is it true the ancient egyptians created a calendar that had 10 days in a week