Answer:
9,000
Step-by-step explanation:
Answer:
This does represent an exponential function , because his savings increase by a constant rate
Step-by-step explanation:
Let
x -----> the number of weeks
y ----> the amount saved
In this problem we have a exponential function of the form

where
a is the initial value
b is the base
r is the rate of change
where

---- because he doubles the amount each week
----> 
substitute

therefore
This does represent an exponential function , because his savings increase by a constant rate
15-7n=4———Fifteen minus the product of seven and a number is four
15/(n+7)———The only answer that says divided
15(n+7)———The first box
15-4n=7———The top right box
7n-15=4———The bottom left box
:))))
1/2 * 1/2 = 1/4 there is a 25% chance that they will both occur