How do you write 564,000,000 in scientific noation

Divide. write in simplest form 41/6 divided by 10

Is the power produced directly proportional to the wind speed, give reasons for your answer?

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?