The Surface Area of a Paraboloid with Radius R and Depth

question 15

Multiple Choice

The surface area of a paraboloid with radius r and depth d is given by . The antenna of a radio telescope is a paraboloid measuring 89 feet across with a depth of 18 feet. Approximate (to the nearest 100 square feet) the surface area of the radio telescope.

• A)13,300 ft²
• B)7100 ft²
• C)1600 ft²
• D)25,900 ft²
• E)7600 ft²

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Definitions:

Negatively Charged Proteins

Proteins that carry a net negative charge at physiological pH, often involved in cellular processes like DNA binding and enzyme regulation.

Resting Plasma Membrane

The state of the plasma membrane of a cell when it is not being excited by external stimuli, maintaining a specific voltage across it.

Positively Charged

Describes atoms or molecules that have more protons than electrons, resulting in a net positive electrical charge.

Electrically Neutral

A condition where an object or system has an equal number of positive and negative charges, leading to no net electrical charge.