To solve this problem we will apply Newton's second law for which weight is defined as the product between mass and acceleration of gravity. That is to say
[tex]F_W = mg\rightarrow m = \frac{W}{g}[/tex]
Here,
m = mass
g = Gravitational acceleration
If we have that 0.22lb is equal to 1N, then the weight will be
[tex]F_W = 2850lb \frac{1N}{0.22lb}[/tex]
[tex]F_W = 12954N[/tex]
Gravitational force is equal to [tex]9.8m/s^2[/tex], then
[tex]m =\frac{12954}{9.8}[/tex]
[tex]m =1320.5kg[/tex]
Therefore the mass of the car is 1320.5Kg