Find the lateral area and total surface area of a regular triangle pyramid with a height of 16 in and a triangular perimeter of 21 in

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

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?

Anumber cube is rolled two times in a row. find the probability it will land on 2 on the first roll and a number greater then 4 on the second roll