What is the volume of the sphere below?

Plzzz help

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

Acarnival sold tickets for $1.50 for adults and $1.00 for students. there were 54 tickets sold for a total of $70.50. write a system of equations to represent the number of adult tickets, x, and the number of student tickets, y. find the solution and explain what it means. i'll you if you me

What is the result of adding the system of equations? 2x+y=4 3x-y=6