If an atom has 23 protons and 23 electrofis, what is its overall charge?

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.

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