A Level is set up midway between two wood hubs that are about 300 ft. apart. The rod reading on hub A is 9.09 ft. and the reading on hub B is 5.65 ft. The level is moved so it is along the side of hub B and about 6 feet away from it. Readings are taken are taken from the new set up with the reading on hub A of 7.11 ft. and on hub B of 3.70 ft. (10 points) (see Section 2.11) a. What is the correct difference in elevation between the hubs A and B

The correct difference is 3.44 ft

Explanation:

The correct difference is given as

D=R_A-R_B

D=9.09-5.65

D=3.44 ft

what was the answer?

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.