Calculus Help
posted by Ulay .
Use differentials to estimate the amount of paint needed to apply a coat of paint 0.03 cm thick to a hemispherical dome with diameter 54 m. (Round your answer to two decimal places.)

v = 2/3 pi r^3 (half a sphere)
dv = 2 pi r^2 dr
now just plug in the given r and dr
watch the units.