Use differentials to estimate the amount of paint needed to apply a coat of paint 0.06 cm thick to a?

hemispherical dome with diameter 44m.Use differentials to estimate the amount of paint needed to apply a coat of paint 0.06 cm thick to a?
why would you use differentials?





Area of sphere is A = 4蟺r虏


half that is 2蟺r虏


radius is 22m or 2200 cm





volume of paint is 2蟺(2200)虏(0.06) cm鲁


or 1.82e6 cm鲁


or 1.82 m鲁





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