Answer:
Step-by-step explanation:
The given expression is
[tex]f(x)=18(0.75)^{x}[/tex]
This exponential function represents the movement of a bouncing ball after being dropped.
[tex]x[/tex] represents the bounce number.
So, at 7th bounce means [tex]x=7[/tex], replacing this value in the function, we have
[tex]f(7)=18(0.75)^{7}=18(0.13) \approx 2.34[/tex]
Therefore, at the 7th bounce, the ball reached 2.3 feet height.