So it's going to be negative 13.84 over negative 0.173 times this evaluated at when t is 10. So e to the, if we multiply this times 10, this is negative 1.73. That's when I evaluated at 10. And from that, we want to subtract when this is evaluated at zero. If the exponent here is zero, if t is zero, the whole exponent is zero. So e to the zero power is just equal to one. And now we can get our calculator out to evaluate this.