Significant figures a) 1.2 x 1.3
f) 32.88 / 4.38
b) 2.16 x 1.8
g) 16.590 / 1.8
c) 1.408 x 2.2
h) 84.99 / 2.03
d) 0.021 x 0.09330
i) 0.99 / 3.4484
e) 4.3324 x 1.2
j) 3.085 / 2.77448

a) 1.6

f)7.51

b)3.9

g)9.2

c)3.1

h)41.9

d)1.959

i)0.29

e)5.2

j)1.112

Explanation:

When you are multiplying or dividing the numbers you take the least amount of significant figures and that's how many significant figures your answer will be. Instead of being a super long answer. Hope this helps. Also, sorry it took me a hot minute :)

pure substance: iron,copper

impure substance: water,charcoal

that tool would be a compass