Question

State the number of significant figures in each of the following. (a) 39 018 (c) 2900 (to the nearest 10) (b) 0.028 030​

Answer 1

Explanation:

a=5( all of them)

b=5 (The last 5, the first two zeroes don't count)

c=2 ( The first two numbers)

Rules:

Non-zero digits are always significant

Any zeros between two significant digits are significant

A final zero or trailing zeros in the decimal portion ONLY are significant

If the zeroes are before a decimal but not in between two significant numbers, they are not significant