The cost of installing an electric heating system for a 3- bedroom home is $5000 and the operating cost is $1,100 per year. A solar heating system costs $29,700 to install but only $150 per year to operate. After how many years will total costs for the two systems be the same? What will the cost be?

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?