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svetlana [45]
2 years ago
12

Can someone please help me?!!? I don't know how to do this and I need help right now

Mathematics
1 answer:
creativ13 [48]2 years ago
7 0

\bf ~~~~~~~~~~~~\textit{distance between 2 points} \\\\ (\stackrel{x_1}{-5}~,~\stackrel{y_1}{3})\qquad (\stackrel{x_2}{4}~,~\stackrel{y_2}{-5})\qquad \qquad d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2} \\\\\\ d=\sqrt{[4-(-5)]^2+[-5-3]^2}\implies d=\sqrt{(4+5)^2+(-5-3)^2} \\\\\\ d=\sqrt{9^2+(-8)^2}\implies d=\sqrt{145}\implies d\approx 12.04

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In preparing a certain ointment, a pharmacist used 28.35 g of zinc oxide instead of the 31.1 g called for. Calculate the percent
Vilka [71]

Answer: 9.70%

Step-by-step explanation:

The formula to find the percentage error is given by :-

\%\text{ error}=\dfrac{|\text{Estimate-Actual}|}{\text{Actual}}\times100

Given : Actual mass of zinc oxide used by pharmacist = 28.35 g

Estimated mass of zinc oxide used by pharmacist =31.1 g

Now, \%\text{ error}=\dfrac{|31.1-28.35|}{28.35}\times100

i.e. \%\text{ error}=\dfrac{2.75}{28.35}\times100

i.e. \%\text{ error}=9.70017636684\approx9.70\%

Hence, the  percentage of error on the basis of the desired quantity.= 9.70%

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3 years ago
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nlexa [21]

Answer:

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Step-by-step explanation:

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6 0
3 years ago
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Step-by-step explanation:

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What is the result of adding
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Step-by-step explanation:

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