Express the following numbers to four significant figures:(i) 5.607892

1.	Express the following numbers to four significant figures:(i) 5.607892(ii) 32.392800(iii) 1.78986 x 103(iv) 0.007837
Answer» (i) 5.608 (Because the number 8 is more than 5, the digit to be retained 7 is increased by 1) (ii) 32.39 (Because 2 is less than 5, the digit to be retained 9 is 0) (iii) 1.790 x 10³ (Because 8 is more than 5, the digit to be retained is increased by 1). (iv) 0.007837

Express the following numbers to four significant figures:(i) 5.607892(ii) 32.392800(iii) 1.78986 x 103(iv) 0.007837

Answer»

(i) 5.608

(Because the number 8 is more than 5, the digit to be retained 7 is increased by 1)

(ii) 32.39 (Because 2 is less than 5, the digit to be retained 9 is 0)

(iii) 1.790 x 10³ (Because 8 is more than 5, the digit to be retained is increased by 1).

(iv) 0.007837