The Area of a Circular Sun Spot Is Growing at a Rate

question 81

Multiple Choice

The area of a circular sun spot is growing at a rate of 1,200 km ²/s. How fast is the radius growing at the instant when it equals 10,000 km?

• A)8.333 km/s
• B)0.000 km/s
• C)0.038 km/s
• D)0.019 km/s
• E)0.060 km/s

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Definitions:

Years

Units of time that represent a period of approximately 365 or 366 days, based on the Earth's orbit of the sun.

Annuity

A financial product that pays out a fixed stream of payments to an individual, typically used as part of retirement planning.

Discount Rate

The interest rate by which future cash flows are devalued to their present worth in a DCF analysis.

Cash Flows

represent the net amount of cash and cash-equivalents being transferred into and out of a business.