Perform each indicated operation. Express your answers in scientific notation. ( 4 . 7 × 10 5 ) ( 2 . 9 × 10 5 ) 4 . 7 × 10 5 2 . 9 × 10 5 5 . 8 × 10 3 2 × 10 8 5 . 8 × 10 3 2 × 10 8 ( 1 . 5 × 10 3 ) + 2491 1 . 5 × 10 3 + 2491 0 . 0005 − 1 . 5 × 10 − 4

Which statement about the relative areas of ? abc and ? xyz is true? the area of ? abc > the area of ? xyz the area of ? abc < the area of ? xyz the area of ? abc = the area of ? xyz more information is needed to compare.

The means and mean absolute deviations of the individual times of members on two 4x400-meter relay track teams are shown in the table below. means and mean absolute deviations of individual times of members of 4x400-meter relay track teams team a team b mean 59.32 s 59.1 s mean absolute deviation 1.5 s 245 what percent of team b's mean absolute deviation is the difference in the means? 9% 15% 25% 65%

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).