Please help me with following questions

The California license plate has one number followed by three letters followed by three numbers. How many different license plates are there? - A big-brand-name dishwasher, which costs $800.00, has a 20% chance of needing to be replaced in the first 2 years of purchase. A two-year extended warranty costs $112.10 on a dishwasher. What is the expected value of the extended warranty assuming it is replaced in the first 2 years? Enter answer to nearest cent; do NOT enter "1? " sign Your Answer: [: Answer Question 3 (1 point) A 95% confidence interval is 6353 km