It Takes Amy Twice as Long to Deliver Papers as It

question 187

Multiple Choice

It takes Amy twice as long to deliver papers as it does Nancy. How long, in minutes, would it take each girl to deliver the papers by herself if they can deliver the papers together in 20 minutes?

• A) 20 minutes for Nancy and 40 minutes for Amy
• B) 40 minutes for Nancy and 20 minutes for Amy
• C) 30 minutes for Nancy and 60 minutes for Amy

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Definitions:

Synaptic Receptors

Protein molecules on the surface of neurons where neurotransmitters bind to transmit signals across synapses.

Active Ingredient

The component of a medication, herb, or concoction that is biologically or pharmacologically responsible for its effects.

Inhibitory Neurotransmitters

Neurotransmitters that decrease the probability of the neuron firing action potentials, thereby reducing neural activity.

Excitatory Neurotransmitters

Chemical messengers in the nervous system that increase the likelihood that a neuron will fire an action potential.