Help please

What is the volume of the sphere shown below with a radius of 3?

What is 1/2 x (6 x 4)+3 + 2 show your work

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?