20% of the shoes in a factor are black. one shoe is chosen and replaced. a second shoe is chosen and replaced. then a third shoe is chosen and replaced. what is the probability that none of the shoes are black?

Tree diagram to find the prime factors of 18

Agrasshopper weighs 0.89 grams. express the grasshopper’s weight in scientific notation.

Robert plans to make a box-and-whisker plot of the following set of data. 27, 14, 46, 38, 32, 18, 21 find the lower quartile, the median, and the upper quartile of the set? lower quartile: 19.5; median: 29.5; upper quartile: 42 lower quartile: 14; median: 27; upper quartile: 46 lower quartile: 18; median: 27; upper quartile: 38 lower quartile: 16; median: 29.5; upper quartile: 42