2 years ago

12 pleaseeeee help meeeee!

Mathematics

2 answers:

m_a_m_a [10]2 years ago

8 0

B because that person said b and i need points

Alex17521 [72]2 years ago

7 0

Answer:

Step-by-step explanation:

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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

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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

How many times larger is the value 0.75 than the value 0.0075?

azamat

0.75 is greater the 0.0075

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Yoko received a $70 gift card for a coffee store. She used it in buying some coffee that cost $7.37 per pound. After buying the

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Yoko bought 5 pounds of coffee.

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Step-by-step explanation:

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2 years ago

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.25(4) = 1 gallon

.25(8) = 2 gallons

.25(12) = 3 gallons

.25(16) = 4 gallons

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it would take 20 minutes to remove half the water (aka 5 gallons)

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