Simplify and write these in the exponential form. (i) 10^-2 × 10^-5 (ii) 5^7 ÷ 5^4 (iii) 9^-7 ÷ 9^4 Class 8
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Simplify and write these in the exponential form. (i) 10-2 × 10-5 (ii) 57 ÷ 54 (iii) 9-7 ÷ 94 Class 8
Question 1.
Simplify and write these in the exponential form. Class 8
(i) 10-2 × 10-5
(ii) 57 ÷ 54
(iii) 9-7 ÷ 94
(iv) (13-2)-3
(v) m5n12(mn)9
Solution:
(i) 10-2 × 10-5 = 10-2-5 = 10-7
(ii) 57 ÷ 54 = 57-4 = 53
(iii) 9-7 ÷ 94 = 9-7-4 = 9-11
(iv) (13-2)-3 = 13-2×(-3) = 136
(v) m5n12(mn)9 = m5n12m9n9 = m5+9n112+9= m14n21
Question 2.
If 122 = 144 what is Class 8
(i) (1.2)2
(ii) (0.12)2
(iii) (0.012)2
(iv) 1202
Solution:
(i) (1.2)2 = 1.44
(ii) (0.12)2 = 0.0144
(iii) (0.012)2 = 0.000144
(iv) 1202 = 14400