How many significant figures are there in each of the following? (a) 69.6t 0.4 (b) 3.2 x 109 (c) 2 x 10-6 (d) 0.0028

a) Three significant figures.

b) Two significant figures.

c) One significant figures.

d) Two significant figures.

Explanation:

a) 69.6 ± 0.4

By place decimal below decimal and then adding or subtracting will get 3 significant figures.

69.6 + 0.4 = 70.0

69.6 - 0.4 = 70.2

b)

Two significant figures.

c)

one significant figures.

d) 0.0028

Two significant figures.

no sign of dia of fuel cell

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).