35*/*per hour

Usually replies in 5 hours

Statistics, Probability
| 10+ other subjects

40*/*per hour

Usually replies in 3 hours

Statistics, Probability
| 10+ other subjects

60*/*per hour

Usually replies in 4 hours

Statistics, Probability
| 10+ other subjects

45*/*per hour

Usually replies in 44 minutes

Statistics, Probability
| 10 other subjects