An Observer, Standing on Level Ground, 100 Feet from the Bottom

question 55

Multiple Choice

An observer, standing on level ground, 100 feet from the bottom of a tower, looks at the top of the tower and notices that his angle of elevation is 0.7 radians. Estimate the height, h, of the tower, rounding your answer to the nearest tenth.

• A) h = 84.2 feet
• B) h = 96.7 feet
• C) h = 102.5 feet
• D) h = 108.3 feet

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Definitions:

Lactose

A sugar present in milk and dairy products, consisting of glucose and galactose units.

Transcription

The process by which the information in a strand of DNA is copied into a new molecule of messenger RNA (mRNA).

Allosteric Site

A region on an enzyme that binds to molecules in the cell, resulting in a change in the enzyme's activity; not the active site where substrate molecules bind.

Tryptophan Operon

A segment of DNA in bacteria that regulates the production of tryptophan by switching the genes responsible for its synthesis on or off.