Can someone please help me find surface area and volume of this sphere?

When can u say there is no solution for a system of linear inequalities? explain your answer and show with a system and graph

You download a video game to your computer. you have a 60-minute free trial of the game. it takes 5 1/6 minutes to set up the game 7 1/3 minutes to play each level. you want to find out how many levels you can play for free.which inequality describes the number of levels, l, you can play in 60 minutes? can you play 6 levels during your free trial? i need ,

Which of the following is true for the relation f(x)=2x^2+1