Planet earth has a mass of 5.9726x10 to the 24th power kilograms. and although 70% of the earths surface is made of water the waters mass is only 5x10 to the negative fourth power percent of the earths total mass. use scientific notation to estimate the mass of the planets water

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

Find the equation of the line with slope =8 and passing through (6,53) write your equation in the form y=mx+b

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?