Ifyouanscorrectiwillfollowyoupleaseansbothquestion
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Sorry i dont know the answer
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Step-by-step explanation:
a)0.0000021 = 21/10000000 = 2.1 × 10-⁸
b) 0.00000000000942 = 492/100000000000000 = 4.92 × 10-¹⁶
If 18 books.... cost
18 books = Rs 1170
1 book = Rs 1170/18
25 books= Rs 65 × 25
= Rs 1625/-
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