How do you find the radius and circumference and area of a curcule

What is the measure of x, in degrees

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.

100 points, hi, i’m not sure how to get the equation from the graph and table.