7. at typical nuclear power plants, refueling occurs every 25 months. assuming that a plant has operated continuously since the last refueling and produces 1.1 gw of electrical power at an efficiency of 34%, how much less massive are the fuel rods at the end of the 25 months than at the start? (assume 30-day months.)

Asix-sided die of unknown bias is rolled 20 times, and the number 3 comes up 6 times. in the next three rounds (the die is rolled 20 times in each round), the number 3 comes up 6 times, 5 times, and 7 times. the experimental probability of rolling a 3 is 10 %, which is approximately % more than its theoretical probability. (round off your answers to the nearest integer.)