Question

8. Compare the following numbers:
(a) 1.8 x 1015: 1.5 X 1020
(b) 2.7 x 1011: 3.0 X 1015
(C) 2.8 X 1020: 3.5 % 1018
(d) 1.008 X 1015: 2.009 X 1020​

Answer 1

Answer:

(a) 1.8×1015:1.5×1020

1827 :1530

203:170

(b) 2.7×1011:3.0×1015

2729.7 : 3045

909.9 : 1015

Answer 2

Answer:

(a) 1.8 x 1015 : 1.5 x 1020

= 1.8 x 10 power 15 = 18/10 x 1015 = 1.8 x 1014

= 1.5 x 10 power 20 = 15/10 x 1020 = 1.5 x 1019

second one is greater because its power is bigger than first one

(b)2.7 x 1011 : 3.0 x 1015

= 2.7 x 10 power 11 = 27/10 x 1011 = 2.7 x 1010

= 3.0 x 10 power 15 = 30/10 x 1015 = 3.0 x 1014

second one is greater because its power is bigger than first one

(c)2.8 x 1020 : 3.5 x 1018

= 2.8 x 10 power 20 = 28/10 x 1020 = 2.8 x 1019

= 3.5 x 10 power 18 = 35/10 x 1018 = 3.5 x 1017

first one is greater because its power is bigger than second one

(d) 1.008 x 1015 : 2.009 x 1020

= 1.008 x 10 power 15 = 1008/1000 x 1015

= 1.008 x 1012

= 2.009 x 10 power 20 = 2009/1000 x 1020

= 2.009 x 1017

second one is greater because its power is bigger than first one

Step-by-step explanation:

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