Answer:
x = 5
Step-by-step explanation:

Hope this helps!
Answer:

Step-by-step explanation:
we know that
In this problem we have a exponential function of the form

where
y ----> represent the pool’s loss of water
x ----> the number of days
a is the initial value
a=25,700 gal
b ----> is the base
r=15%=15/100=0.15
b=(1-r)=1-0.15=0.85
The function is equal to

The slope of these two points are 1.7
Injective. (x) would have to be used in 2 places which would cross.