A cent is equal to one hundredth of an acre, or 435.6 square feet. Therefore, ten cents is equal to 10 x 435.6 = 4356 square feet.
A Mekko chart (sometimes also called marimekko chart) is a two-dimensional stacked chart. In addition to the varying segment heights of a regular stacked chart, a Mekko chart also has varying column widths. Column widths are scaled such that the total width matches the desired chart width.
Centi- means one-hundredth, so 1metre = 100 centimeters, therefore 1 decameter = 10 x (100 centimeters) = 1000 centimeters. Hecto- means one hundred, therefore 1 hectometer = 100 meters = 10 decameters. Kilo- means one thousand, of course, so 1 kilometer = 1000 meters, and since 1 hectometer = 100 meters, 1 kilometer = 10 hectometers. The only ones your daughter needs to bother about are millimeter, centimeter, and kilometer, and she should learn to manipulate these confidently. 1 centimeter = 10 millimetres 1 meter = 100 centimeters, or 1000 millimeters.