Element X decays radioactively with a half life of 10 minutes. If there are 760 grams of Element X, how long, to the nearest tenth of a minute, would it take the element to decay to 39 grams?

Arectangle has a width of 9 units and length of 40 units. what is the length of a diognal. a. 31 unitsb. 39 unitsc. 41 units d. 49 units

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?

Ihonestly have no clue if it's each or none.