Square A′B′C′D′ is the image of square ABCD under a dilation from center O1 by scale factor r. Square A′′B′′C′′D′′ is the image of square A′B′C′D′ under a dilation from center O2 by scale factor 14. The side lengths of square A′′B′′C′′D′′ are 18 of the corresponding side lengths of square ABCD. What is the scale factor r?

[ou.01]which of these is the most likely use of an electromagnetic wave which has wavelength shorter than microwaves but longer than visible light? o heat food safely o neat food safely o take images of bones and teeth o transmit radio and cellular phone signals o take images of bones and teeth o transmit radio and cellular phone signals o detect the location of objects which emit heat