D. If you were talking to an elderly person who was having trouble hearing you, would it be better to talk in a deeper voice (low-frequency sound) or a higher voice (high-
frequency sound)?

Deeper Voice (low-frequency sound)

Explanation:

For me, I would talk to an elderly person who has trouble hearing me in a deeper voice because at least it's not too loud. If you talk to a person with a higher voice (high-frequency) it can just affect their hearing more when you scream, that a high-frequency and sometimes it bothers your ears, so for me in general I would use a deeper voice.

Hope this helped!

Have a day!

consider the reaction below.

 no rx

at 500 k, the reaction is at equilibrium with the following concentrations.

[pci5]= 0.0095 m

[pci3] = 0.020

[ci2] = 0.020 m

what is the equilibrium constant for the given reaction?

0.042

0.42

2.4

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