Figure ABCD below is a rectangle with the side AB 20.0 m long and angle DAC= 39o. Find the lengths of diagonal AC and side AD.

d) the number of neutrons plus the number of protons

found in the nucleus

has mass of one amu

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.