Question

Need to find pounds per cubic feer rounded to the nearest hundredth

Answer 1

We are giving

a medicine with density

`2200(kg)/(m^3)`

we are request to find th density in pounds/ft^3

`(lb)/(ft^3)`

the trick here is that the units we don't want to use get's canceled

Open itsi way to the new units

as following

`(kg)/(m^3)*(lb)/(kg)*(m^3)/(ft^3)=(lb)/(ft^3)`

then

the 2200 density of medicine

`2200(kg)/(m^3)*(2.2lb)/(1kg)*(1m^3)/(35.3ft^3)`
`2200(kg)/(m^3)*(2.2lb)/(1kg)*(1m^3)/(35.3ft^3)=137.11(lb)/(ft^3)`

then

2200kg/m^3 = 137.11 lb/ft^3