The height of a book is 218 mm correct to the nearest millimetre. Complete the error interval for the height of the book.

Find the area of a parallelogram with base 15 yards and height 21 2/3

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1

Delbert keeps track of total of the total number of points he earns on homework assignments, each of which is worth 60 points. at the end of the semester he has 810 points. write an equation for delbert’s average homework score a in terms of the number of assignments n.