Classify each of the following reactions. The equations are not balanced.
(a) Mg + HCl H2 +MgCl2
single displacement
double displacement
synthesis (combination)
decomposition
combustion
(b) Al2(SO4)3 + Cu(NO3)2 CuSO4 + Al(NO3)3
single displacement
double displacement
synthesis (combination)
decomposition
combustion
(c) C3H9 + O2 CO2 + H2O
single displacement
double displacement
synthesis (combination)
decomposition
combustion
(d) PbCl2 Pb + Cl2
single displacement
double displacement
synthesis (combination)
decomposition
combustion
(e) H2 + O2 H2O
single displacement
double displacement
synthesis (combination)
decomposition
combustion

if a = 1,   and b = 2, then the answer is 47.99999999. if you round that to the nearest whole number, the answer is 48.

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

happy to

pls mark as brainliest

do you have a picture of the table

step-by-step explanation:

part a. the differences are decreasing, so we know the sequence is not arithmetic. the ratios are constant (=3/4), so we know the sequence is geometric.

part b. from part a, we know the common ratio is 3/4, so each term is 3/4 of the one before. the initial term is the number of gallons at h=1.

g[h] = (3/4)·g[h-1]

g[1] = 384 . . . . initial value required for a recursive definition

part c. the general formula for a geometric sequence is

a[n] = a[1]·r^(n-1)

we have a[1] = 384, r = 3/4, and the term number given by h. the formula that follows is

g[h] = 384·(3/4)^(h-1)

part d. filling in the value and doing the arithmetic, we have

g[12] = 384·(3/4)^11 ≈ 384·0.042235136 ≈ 16.2183 . . gallons

part e. each gallon is 4 quarts, so

16.2183 gal × 4 qt/gal = 64.8732 qt