Aditya deposits $500 in a savings account over the course of a year. he deposits money into the account throughout the next year until his balance is quadrupled. the next year he does the same and deposits money into the account until his previous year’s balance is quadrupled. assume that this trend continues and his account does not earn interest. consider his initial balance to be year one. what explicit formula can be used to determine the balance of his savings account at the end of n years?
an=4⋅500^n

an=500⋅4^n−1

an=500⋅4^n

an=4⋅500^n−1

i think its either b or c

step-by-step explanation:

subtract 7, so the answer is x < = 3, or c.

first option

a function is a relation in which an input is paired with exactly one output.

so, let's find the right answer.

in our first option, our inputs are january, february, and march. the outputs are 30, 28, and 25. each input has it's own output. this is correct!

our second option we know is incorrect, because ms. valverade has two outputs, dogs and cats. this is not a function.

our third option is incorrect as well. the yellow square has two ouputs, the square and the triangle.

lastly, in our fourth option, we see the number 7 two times with a different output. therefore, this is not a function.

remember: each input must be paired with only one output!