Answer:
a) 289
b)1.24
c)0.066
d)2400
Step-by-step explanation:
(a) 289.0456 (4 s.1)
We want to round, 289.0456 to four significant figures.
We start counting from 2 because it is a significant digit and end on zero.
Therefore 289.0456=289.0 to 4 s.f
Or 289
(b) 1.236 (3 s.f.)
We want to round 1.236 to three significant figures.
We start counting from 1 and end on 3, but we need to run up because 6≥5
Therefore 1.236=1.24 to three significant figures.
(c) 0.06573 (2 s.)
To round 0.06573 to two significant figures, we need to start counting from the first non-zero digit, which is 6 and end on 5 and then round up because 7≥5
0.06573=0.066 to 2 s.f
(d) *2408 (2 s.f.)
To round 2408 to two significant figures, we start counting from 2 and end on 4.
We round off because 0<5
In this case we need to replace all digits after 4 with zeros.
2408=2400 to 2 s.f
