Evaluate:
`(8.6)^(2)-(1.4)^(2)`

Evaluate : ((6.4)^(2)-(5.4)^(2))/((8.9)^(2)+(8.9xx2.2)+(1.1)^(2))

Evaluate : ((4 + 8)/(2-(-6)))(4+8 -: 2 -(-6))

Evaluate |(4+8)/(2-(-6))|-[4+8div 2-(-6)]

Evaluate 8-8xx(2(1)/(5)-1(2)/(7))/(2-(1)/(6-(1)/(6)))

Find the value of v : 10 (1)/(2) - [8(1)/(2) + { 7 - bar(6-4)}] bar(6-4) =2 (v)

Find the mode in each of the following data collection. 8,6,7,6,5,4, (1)/(2), 7 (1)/(2), 6 (1)/(2), 8 (1)/(2), 10,7,5,5(1)/(2), 8,9 7,5,6,8 (1)/(2),6

Find the sum of infinite terms of the series : (3)/(2.4) + (5)/(1.4.6) + (7)/(2.4.6.8)+ (9)/(2.4.6.8.10)+……

Let X={1, 2, 3, 4} and Y={2, 4, 6, 8, 10} and R={(1, 2), (2, 4), (3, 6), (4, 8)} . Find the range =____.