Pick the Best Choice by Estimating

question 14

Multiple Choice

Pick the best choice by estimating. Do not measure. For metric measurements, do not attempt to convert to the U.S. system. The area of a classroom is __________.
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• A) 0.5 acre
• B) 1,000 ft²
• C) 0.15 acre
• D) 100 ft²
• E) 0.55 acre

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Definitions:

Lithium-Based Grease

A lubricant made primarily of lithium soap which is known for its high resistance to heat and its use in automotive and industrial applications.

Operating Angles

The specific angles at which certain mechanical parts, such as driveshafts, are designed to operate efficiently.

Propeller Shaft

The mechanical component used to transmit power from an engine or motor to the propeller in a boat or aircraft.