Provide an Appropriate Response $\$ 1.29$ Each, 3 Blue Pens At $\$ 1.49$

question 8

Multiple Choice

Provide an appropriate response.
-Jim buys his school supplies in bulk. On one particular shopping trip he bought 5 red pens at $\$ 1.29$ each, 3 blue pens at $\$ 1.49$ each, 6 green pens at $\$ 1.79$ each and 9 black pens at $\$ 0.99$ each. What was the average cost of a pen?

• A) \(\$ 1.33\)
• B) \(\$ 1.29\)
• C) \(\$ 0.99\)
• D) \(\$ 1.39\) 3 Approximate the Variance and Standard Deviation of a Variable from Grouped Data

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Definitions:

T Tubules

Tubular extensions of the cell membrane that penetrate into the center of skeletal and cardiac muscle cells, facilitating the transmission of electrical signals.

Sarcolemma

The fine transparent tubular sheath that envelops the fibers of skeletal muscles.

Sarcoplasmic Reticulum

A network of tubules within muscle cells that stores and releases calcium ions, playing a key role in muscle contraction.

Sarcoplasmic Reticulum

A specialized type of smooth endoplasmic reticulum found in muscle cells, involved in the storage and release of calcium ions during muscle contraction.