At Lunchtime, a Man Called His Wife from His Office

question 27

Multiple Choice

At lunchtime, a man called his wife from his office to tell her that they needed to switch vehicles so that he could use the family van to pick up some building materials after work. The wife then left their home, traveling towards his office in their van at 32 mph. At the same time, the husband left his office in his car, traveling towards their home at 47 mph. If his office is 47.4 miles from their home, how long will it take them to meet so that they can switch vehicles?

• A) 0.3 hr
• B) 1.1 hr
• C) 0.6 hr
• D) 1.6 hr
• E) 2.6 hr

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Definitions:

Primary Succession

An ecological succession that occurs on land that has not previously been inhabited by plants; no soil is present initially. See succession. Compare with secondary succession.

Zooplankton

The nonphotosynthetic organisms present in plankton (e.g., protozoa, tiny crustaceans) and the larval stages of many animals. See plankton. Compare with phytoplankton.

Species Richness

The number of different species represented in an ecological community, landscape, or region.

Müllerian Mimicry

The resemblance of dangerous, unpalatable, or poisonous species to one another so that potential predators recognize them more easily. Compare with Batesian mimicry.