A farmer has harvested 1.6 tons of sweet potatoes from one-quarter of an acre. How many tons will he harvest from one acre?

With number 11 ( show how you got the answer)

Margaret is purchasing a house for $210,000 with a 15 year fixed rate mortgage at 4.75% interest she has made a 5% down payment the house is valued at 205,000 and the local tax rate is 3.5% homeowners insurance 600 per year what are her total monthly payment

Is the number 128.439 a rational number