What are the common factors of 20w and 40w

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.

Nine more than four times a number is the same as one less than twice the number. find the number?

Which of the following is closest to 32.9 x 7.5? a: 232 b: 259 c: 220 d: 265