Scientists using the hubble space telescope have observed cepheids in the galaxy m 100. here are the actual data for three cepheids in m 100:
cepheid 1: luminosity = 3.9×1030 watts, brightness 9.3×10−19watt/m2
cepheid 2: luminosity = 1.2×1030 watts, brightness 3.8×10−19watt/m2
cepheid 3: luminosity = 2.5×1030 watts, brightness 8.7×10−19watt/m2
compute the distance to m 100 with data from each of the three cepheids.
express your answers using two significant figures. enter your answers numerically separated by commas.

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees. 

the force on the thing and the distance the force moves the thing

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.