How to write 4100 in scientific notation?

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?

What is the slope of the line (-7,2) (4,6)

Need same math paper but the back now i hope your able to read it cleary i need with hw