Use a positive or a negative number to denote each of the following. (i) 18 m above sea level (ii) 8 m below sea level

Represent the following using integers with proper sign : 3 km above sea level

Indicate the following using '+' " or " '-' sign : (i) A gain of Rs. 600 (ii) A loss of Rs. 800 (iii) 7^(@) C below the freezing point (iv) Decrease of 9 (v) 2 km above sea level (vi) 3 km below sea level (vii) A deposit of Rs. 200 (viii) A withdrawal of Rs. 300

If we denote the height of a place above sea level by a positive integer and depth below the sea level by a negative integer, write the following using integers with the appropriate signs: (a) 200 m above sea level (b) 100 m below sea level (c ) 10 m above sea level (d) sea level

Write opposite of the following: 100 m above sea level.

Compare the weights of the body when it is (i) 1km above the surface of the earth and (ii) 1 km below the surface of the earth . Radius of the earth is 6300 km.

Height of a place A is 1800 m above sea level. Another place B is 700 m below sea level. What is the difference between the levels of these two places?