4. Sale of Mathematics and English books in the year 2005, 2006, 2007 and 2008 are given below : Years Mathematics English 2005
200 100 2006 300 250 2007 400 200 2008 500 500 Question 1. In which year is the difference in the sale minimum? (a) 2008 (b) 2007 (c) 2006 (d) 2005 Question 2.
A) 0 represents the surface of the pool. B) The height of the pool is 10 above the pool surface C) It should be -3 since it is going down so it is going to be a negative number and it is also below the pool's surface.
