from math import exp

def v(t_ :float):
    return 5 + 2 * exp(-0.5 * t_)


a = 1  # intervallets undre gräns
b = 9  # intervallets övre gräns
n = 1000  # antal delintervall

dt = (b - a) /n
t = a + dt / 2

stracka = 0
for i in range(n):
    stracka = stracka + v(t) * dt
    t = t + dt

print(f'Skidåkaren hinner {round(stracka, 1)} m')