Which of the following is true when comparing the following numbers on a horizontal number line? -4/5? -0.9

Which is the standard form for this number? (4 x 1 100 ) + (8 x 1 1,000 ) + ( 3 x 1 100,000 ) ? a) 0.004803 b) 0.04803 c) 0.0483 d) 0.483

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30

Having a hard time understanding this question (see attachment).