A Boat Travels Upstream (Against the Current) Between Two Points $10$

question 88

Multiple Choice

A boat travels upstream (against the current) between two points on a river $10$ mi apart in $2.5$
Hours. The return trip downstream takes only $45$
Minutes. What is the boat's speed, and how fast does the current in the river flow?

• A)The speed of the boat is \(4.5\)
• Mi/h and the speed of the current flow is about \(8.4\)
• Mi/h
• B)The speed of the boat is \(8.7\)
• Mi/h and the speed of the current flow is about \(4.7\)
• Mi/h
• C)The speed of the boat is \(6.7\)
• Mi/h and the speed of the current flow is about \(8.7\)
• Mi/h
• D)The speed of the boat is \(5\)
• Mi/h and the speed of the current flow is about \(4\)
• Mi/h
• E)The speed of the boat is \(13.7\)
• Mi/h and the speed of the current flow is about \(6.7\)
• Mi/h.

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Definitions:

Technical Hypothesis

An alternative expression for hypothesis, focusing on a detailed, often scientific prediction or explanation that requires testing and validation through experiments or observation.

FOXP2 Gene

A gene associated with language and speech development in humans, mutations in which can lead to speech and language disorders.

Cerebral Blood Flow

The movement of blood through the network of blood vessels in the brain, critical for delivering nutrients and oxygen while removing wastes.

Natural Selection

The process by which heritable traits that confer a survival or reproductive advantage become more common in a population over generations.