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Delicious77 [7]
3 years ago
5

A 80-milliliter solution of a fabric dye contains 4 ml of hydrogen peroxide. What is the percent concentration of the hydrogen p

eroxide?
Mathematics
1 answer:
fgiga [73]3 years ago
6 0

Answer:

idk

Step-by-step explanation: good luck

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Pls help i dunno what to do with these problems
Evgesh-ka [11]

Answer: D

Step-by-step explanation:

I've done this

3 0
1 year ago
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An education budget went from $800,000 to $900,000. what is the approximate percent increase?
VikaD [51]
First, calculate the difference between the two given budgets. $900,000 - $800,000 = $100,000. Divide the difference obtained by the original budget and then multiply by 100%
                              ($100,000 / $800,000) x 100% = 12.5%

<span>Thus, the answer to the question above is that the percent increase is 12.5%.</span>
6 0
3 years ago
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In a random sample of microwave​ ovens, the mean repair cost was ​$ and the standard deviation was ​$. Using the standard normal
Semmy [17]

Complete Question

In a random sample of 13 microwave ovens, the mean repair cost was $90.00 and the standard deviation was $15.20. Using the standard normal distribution with the appropriate calculations for a standard deviation that is known, assume the population is normally distributed, find the margin of error and construct a 98% confidence interval for the population mean u. A 98% confidence interval using the t-distribution was (78.7,101.3). Compare the results. The margin of error of u is

Answer:

The value  is  E = 11.65

Step-by-step explanation:

From the question we are told that

    The sample is  n  = 13

     The sample mean is  \= x  =  \$ 90

     The standard deviation is  \sigma = \$ 15.20

      The  lower limit of the  98% confidence interval is a =  78.7

      The  upper  limit of the  98% confidence interval is b =  101.3

Generally the margin of error is mathematically represented as

        E = \frac{b-a}{2}

=>    E = \frac{ 101.3 - 78 }{2}

=>    E = 11.65

7 0
3 years ago
What is the distance between points A and B? Use absolute value to explain your answer.
skelet666 [1.2K]

Answer

(1,2)

Step-by-step explanation:

6 0
2 years ago
Solve y=3x-7 and 4x+3y=18 by substitution
Schach [20]

Answer:

x = 3

y = 2

Step-by-step explanation:

4x + 3(3x - 7) = 18 <em>Substitute</em><em> </em><em>y</em>

4x + 9x - 21 = 18 <em>Simply</em>

13x - 21 = 18 <em>Add</em><em> </em><em>like</em><em> </em><em>terms</em>

13x = 39 <em>Add</em><em> </em><em>2</em><em>1</em>

x = 3 <em>Divide</em><em> </em><em>by</em><em> </em><em>1</em><em>3</em>

y = 3(3) - 7 <em>Substitute</em><em> </em><em>x</em>

y = 9 - 7 <em>Simply</em>

y = 2 <em>Subtract</em>

Let's check:

4(3) + 3(2) = 18

12 + 6 = 18

18 = 18

It works!

5 0
3 years ago
Read 2 more answers
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