Use cylindrical coordinates. Evaluate

E
z dV,
where E is enclosed by the paraboloid
z = x2 + y2
and the plane
z = 16.

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Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.