So negative 0.173, and you could use your calculator. Calculators are allowed for this part of the problem, but we could do this analytically. Times e to the negative 0.173 times t, and we're going to evaluate that. We're going to evaluate that from zero to 10. So we're going to evaluate it at 10 and subtract from that this thing evaluated at zero. So this is going to be, let me just factor out this part right over here. So it's going to be negative 13.84 over negative 0.173 times this evaluated at when t is 10.