# how many siginificant figures are there in 5*2^4

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HOW MANY SIGNIFICANT FIGURES ARE THERE IN $5*2^4$

by (20 points)
5*16=80

80 has 1 significant digit
by (45 points)
5 × 2⁴ = 5 × 16 = 80 = 8.0 × 10¹
Since there are 2 significant figures in 8.0 (i.e. 8 and 0), the total number of significant figures is 2.
Therefore, number of significant figures in 5 × 2⁴ is '2'.

+1 vote