3x^3y and 5xy^2 pls help me find the answer

Me! 50 points! why does when we come home, our door is unlocked and there is grease on the door knob, me solve this , and i don't know what category this goes under

Someone answer this check out the image!

In his free time gary spends 7 hours per week on the internet and 13 hours a week playing video games. if gary has 5 hours of free time per day approximately what percent of his free time is spent on the internet and playing video games?