PLEASE HELP ASAP. WILL MARK BRAINLIEST

What is the most accurate measurement of 1 pound

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

What is the equation of a vertical line passing through the point (−5, −1)? y = −5 y = −1 x = −5 x = −1