Chapter 5 - Exponential Functions - 5.5 Exponential Growth and Decay Rates and Compounding Interest - 5.5 Exercises - Page 469: 7

$5\%$ decay.

Growth or decay rate $r=b-1$ where $r$ is a percentage written as a decimal and $b$ is the base of an exponential function of the form $h(x)=a\cdot b^{x}$. Given $h(x)=25(0.95)^{x}$ $\implies b=0.95$ $r=b-1=0.95-1=-0.05$ Or $r=-0.05\times100 \%=-5\% $ $r$ is negative. So, there is $5\%$ decay.