PLS HELP WILL GIVE YALL BRAINLIEST Andrea is comparing the shifts in energy of two distant galaxies. Using a powerful telescope, she records the energy movement of each galaxy every 20 seconds (s) for six hours (hr). After sharing his data with another astronomer, they tell her that this is not an experiment. Why?

Agroup 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?