Ayah has $245 in his bank account. Which of the following would lead to no change in his account balance?

a)
A deposit of $78 and a withdrawal of $78
b)
A deposit of $245 and a withdrawal of $490.
c)
A withdrawal of $490 and a deposit of $245
d)
A deposit of $490 and a withdrawal of $245

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?