The table shows data from a survey about the number of times families eat at restaurants during a week. the families are either from rome, italy or new york, new york: maximum minimum q1 q3 iqr median mean σ rome 16 0 3 13 10 8.5 8 5.4 new york 20 1 4.5 6 1.5 5.5 7.25 5.4 which of the choices below best describes how to measure the center of this data? both centers are best described with the mean. both centers are best described with the median. the rome data center is best described by the mean. the new york data center is best described by the median. the rome data center is best described by the median. the new york data center is best described by the mean.

Submarines control how much they float or sink in the ocean by changing the volume of air and water contained in large ballast tanks. when the tanks are completely full of water, the submarine increases its overall mass and sinks down to the bottom. when the tanks are completely full of air, the submarine reduces its overall mass and floats to the surface. depending on the density of the seawater surrounding the submarine, it will pump seawater in or out of the tanks in order to achieve the same overall density as the sea water and float neutrally in the water. the volume of the submarine never changes. when the tanks are completely full of water, a submarine with a volume of 7.8\times10^3\text{ m}^37.8×10 3 m 3 7, point, 8, times, 10, start superscript, 3, end superscript, space, m, start superscript, 3, end superscript has a total mass of 8\times10^6\text{ kg}8×10 6 kg8, times, 10, start superscript, 6, end superscript, space, k, g. the density of the seawater is 10^3\text{ kg/m}^310 3 kg/m 3 10, start superscript, 3, end superscript, space, k, g, slash, m, start superscript, 3, end superscript. to make that submarine float neutrally, and neither float nor sink in the ocean, what volume of water does that submarine need to subtract from its tanks?