A recurrence interval of 15 years means that a peak steam discharge of a certain value (or above), according to the historical data, occurs on average every 15 years. True or False?

A recurrence interval of 15 years means that a peak steam discharge of a certain value (or above), according to the historical data, occurs on average every 15 years. True or False?

Recall the dice experiment used in lab to model radioactive deacy. if we had used 10-sided dice instead of 6-sides dice, and removed even numbers and kept odd numbers on each roll, how long would it take for one half-life in this new experinment?

1. About ten rolls
2. About four rolls
3. About two rolls
4. About one roll

In a plunging fold, the fold axis will be

1. Dipping

2. absent

3. horizontal