Are lines of symmetry for any given polygon also diagonal?

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?

Multiple questions for the same graph find the lowest value of the set of data this box-and-whisker plot represents.12131516find the upper quartile of the set of data this box-and-whisker plot represents.20151618