1. The problem statement, all variables and given/known data A radius of a sphere is measured to be (6.45 ± 0.27) cm, and the mass is measured to be (1.78 ± 0.09) kg. Determine the density of the sphere in kilograms per cubic meter and the uncertainty in the density. 2. Relevant equations Use the following formula to calculate the uncertainty in the density: Δρ/ρ = Δm/m + 3Δr/r.) 3. The attempt at a solution I already found the density: 1583.62 kg/m3 I just want to know how to get the uncertainty. I don't know how to use the formula given. i always get a really low number with it.