Grooves and polished surfaces on desert pebbles are most likely caused by

a. deflation

b. abrasion

c. yardangs

On the loan worksheet in cell c9 enter pmt function to calculate the monthly payment for the altamonte springs 2018 facilities loan. ensure that the function returns a positive value and set the reference to cells b5 and b6 as absolute references.

3. bob is arguing that if you use output feedback (ofb) mode twice in a row to encrypt a long message, m, using the same key each time, it will be more secure. explain why bob is wrong, no matter what encryption algorithm he is using for block encryption (15 points).

Hazel has just finished adding pictures to her holiday newsletter. she decides to crop an image. what is cropping an image?