What is this? ? and how do you work it

You are making a battery for a science project. you have copper wire for your first electrode. you need to choose a conductor, a second electrode, and a device to plug into your battery. you have already chosen a lemon conductor. complete each statement below about the options that include a lemon conductor.

Solve the equation -9p - 17 =10 a -3 b. 16 c. 18 d -16

The measure of angle 0 is 600 degrees