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kenny6666 [7]
3 years ago
9

While finding the mass of an unknown substance using a triple beam balance, Raquel forgets to subtract the mass of the pan holdi

ng the substance from her measurement. What kind of error will this likely produce in her results?
A. They will be less precise, but just as accurate.
B. They will be less accurate, but just as precise.
C. They will be both less precise and less accurate.
D. They will be incorrect, but neither the precision nor the accuracy will be affected.
Mathematics
1 answer:
Nezavi [6.7K]3 years ago
5 0
<span>B. They will be less accurate, but just as precise.

The precision come from using the same type of measurement over and over.
</span>
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Recall that

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Dividing both sides by cosh²(x) gives

1 - \tanh^2(x) = \mathrm{sech}^2(x)

Also, recall the identity

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Then

\dfrac{2\tanh\left(\frac x2\right)}{1 - \tanh^2\left(\frac x2\right)} = \dfrac{2\tanh\left(\frac x2\right)}{\mathrm{sech}^2\left(\frac x2\right)} \\\\ \dfrac{2\tanh\left(\frac x2\right)}{1 - \tanh^2\left(\frac x2\right)} = 2\tanh\left(\dfrac x2\right)\cosh^2\left(\dfrac x2\right) \\\\ \dfrac{2\tanh\left(\frac x2\right)}{1 - \tanh^2\left(\frac x2\right)} = 2\sinh\left(\dfrac x2\right)\cosh\left(\dfrac x2\right) \\\\\dfrac{2\tanh\left(\frac x2\right)}{1 - \tanh^2\left(\frac x2\right)} = \sinh(x)

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3 years ago
If you choose a card at random from a well shuffled deck of 52 cards, what is the probability that the card chosen is not a hear
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A number - n
five times the number - 5n
nine more than five times the number - 5n+9

The answer is D.
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Guys I need help please actually answer and explain! Will mark brainlest!
melomori [17]
23 I just need points
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<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B11%7D%7B7%7D%20%20%5Cdiv%20%20%5Cfrac%7B7%7D%7B10%7D%20" id="TexFormula1" title="
AysviL [449]

11/7÷7/10

=11/490

Hope this helps!

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3 years ago
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