Air is escaping from a spherical balloon at the rate of 2 cm3 per minute. How fast is the surface area shrinking when the radius is 1 cm? = ! " and = 4# "
where V is the volume and S is the surface area, r is the radius.

The color contrast between the open ocean and the lagoon between the spit and the mainland. the greater concentration of suspended sediments in the lagoon gives the waters a more turbid appearance. the source of sediment in the lagoon is (are) [(rivers and streams from the mainland) (wind-borne sediment from the spit) (ocean waves washing over the spit) (all of these contribute)].