87.41898806% or 87% is what i got
The answer to your problem is -9 and 3/4.
Answer:
Step-by-step explanation:
We can rewrite the given functions in the form 
to determine the rate of growth or 
to determine the rate of decay
Five taken away from n
n subtracted by five
Answer:
He initially has $50 on his card.
For each night that he goes to play, $10 are discounted from the card, then if he went x nights to play, the amount of money that there is in the card is:
b(x) = $50 - $10*x
Now, notice that x must be a whole number because this measures the number of nights that he went to play, and we can not have rational numbers to describe this.
Then the domain of this function will be discrete (and this implies that the range must also be discrete)
Where the possible values of x are:
{0, 1, 2, 3, 4, 5}
(after x = 5, there is no more money in the card)
And the possible values of b(x) are:
{$0, $10, $20, $30, $40, $50}
