One of the contests at the school carnival is to throw a spear at an underwater target lying flat on the bottom of a pool. The water is 0.800 m deep. You're standing on a small stool that places your eyes 3.10 m above the bottom of the pool. As you look at the target, your gaze is 30∘ below horizontal. At what angle below horizontal should you throw the spear in order to hit the target?

The angle below horizontal you throw the spear in order to hit the target = 31 degree

Explanation: please find the attached files for the solution and figure

the answer is a. at the equator

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.