What integers when added to-7 give a sum greater than 0

Acircle has a circumference of 28.36 units what is the diameter of the circle

When 142 is added to a number the result is 64 more then 3 times the number. option 35 37 39 41

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?