How to write 3,028,002 in expanded form

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

The system of equations graphed below has how many solutions?

Compare the cost of the bike trips from the two companies shown.for both the cost in a linear function of the number of days which statements is true