Tutor profile: Alexis N.
Are correct grammar and punctuation essential elements of a paper or essay?
-9(4+6(-3)) - (-12)
A spherical snowball with an outer layer of ice melts so that the volume of the snowball decreases at a rate of 2 cm^3 / min. How fast is the radius changing when a diameter of the snowball is 10 cm?
20 pi cm/sec
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