Identify the double displacement reaction.

2NH3 + H2SO4 ⟶ (NH4)2SO4
2NaBr + Ca(OH)2 ⟶ CaBr2 + 2NaOH
2NO2 ⟶ 2O2 + N2
3Pb + 2h3PO4 ⟶ 3H2 + Pb3(PO4)2

(a) the volume of the cone is 20/3 in3

hence, option a is correct.

step-by-step explanation:

a cube has 6 sides

the probability of getting 5 on the first cube is 1/6 since only one side of the cube has 5 on it.

there are 3 sides of the cube with even number on it [2,4,6]

therefore the probability of getting even number is 3/6

for both events to happen together, the probability would be

1/6 x 3/6 = 12/36

which simplifies to 1/12

c = 0.429t

step-by-step explanation:

the constant rate at which carlos harvests cassava is 35 minutes per 15 cassavas 15/35 = 0.429 cassava per minute

therefore, an equation that models the number of cassava (c) that harvest carlos in a time (t) is the following:

where t is the time in minutes.

this means that when 35 minutes have elapsed 15 cassava have been harvested, at 70 minutes 30 cassava have been harvested and so on.