The dot on the number line represents which fraction? a number line from zero to one divided into eighths. dot on two eighths. 8

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Find the percent error of the measurement 4 cm

M∠abc=138° and m∠def=31° . which statement is true about ∠abc and ∠def ? a: the angles are neither complementary nor supplementary. b: the angles are complementary. c: the angles are supplementary.