What’s the stander form 7√n4

Which is a reasonable estimate of the amount of water in a small, inflatable pool used by children?

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

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then