Solve Using a System of Two Equations in Two Unknowns

question 36

Multiple Choice

Solve using a system of two equations in two unknowns.
-A retired couple has $150,000 to invest to obtain annual income. They want some of it invested in safe Certificates of Deposit yielding 6%. The rest they want to invest in AA bonds yielding 12% per
Year. How much should they invest in each to realize exactly $15,000 per year?

• A) $100,000 at 6% and $50,000 at 12%
• B) $90,000 at 6% and $60,000 at 12%
• C) $100,000 at 12% and $50,000 at 6%
• D) $110,000 at 12% and $40,000 at 6%

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Definitions:

Synaptic Vesicles

Membrane-bound sacs within a nerve cell (neuron) that contain neurotransmitters, which are released into the synaptic cleft to transmit signals between neurons.

Synaptic Cleft

The small gap between neurons at a synapse, through which neurotransmitters are released to transmit nerve impulses.

Presynaptic Terminal

The end point of a neuron that communicates with another neuron or muscle cell across a synapse, releasing neurotransmitters to transmit nerve impulses.

Sarcolemma

The thin, plasma membrane surrounding a muscle fiber, crucial for muscle contraction and interaction.