Find the standard deviation of (7,8,11,10) *please show work on paper or graphing calculator

What is the result of converting 60 ounces to pounds remember there are 16 ounces in a pound

Me. i can't figure out this question. give an explanation too. .

(05.02)a farmer has decided to divide his land area in half in order to plant soy and corn. calculate the area of the entire area so he knows how much soil is needed. a parallelogram with a height of 6 yards and side length 9 yards. the height forms a triangle with the slanted side of the rhombus with a base of 2.5 yards. rhombus is split into a soy half and a corn half. each bag of soil covers 40 square yards. how many bags should the farmer purchase?