What is the coefficient, a variable, and a constant for the expression 50+5w+20m

What is the exact volume of the cylinder (radius 13 in., height 30 in.)

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.

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length