1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alenkasestr [34]
3 years ago
13

The percentage of water in an unknown hydrate was determined by heating the sample and driving the water off the sample. Two ind

ependent measurements gave values of 19.564% and 21.731%. Its percentage should be reported as:
Mathematics
1 answer:
Bas_tet [7]3 years ago
8 0

Answer:

It should be reported as 20.648%

Step-by-step explanation:

Since we have 2 different observed values hence we shall use an average of the 2 values to report the result

Thus value is \frac{19.564+21.731}{2}=20.6475%

As we can see that the least count of our observations is upto 3 decimal places hence we have to report a result upto only 3 decimal places thus we need to round off the fourth decimal place thus the digit shall be increased by 1 since we have to drop off 5 and the digit before 5 is 7 which is an odd number.

Thus the result shall be 20.648%

You might be interested in
The Corner Cafe offers a 10% off senior citizen discount. If Mr. and Mrs. Schmidt order $36.00 worth of food and are senior citi
Brrunno [24]

Answer:

$3.60

Step-by-step explanation:

$36.00 × 10%= $3.60

5 0
3 years ago
1/5 of the mangoes in a bag is green ,0.75 are ripe and the remaining 12 mangoes are rotten . How many mangoes are there in the
Natalija [7]

*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆

Answer: 240 mangoes

Explanation:

1/5 + 0.75 = .95 = 95%

5% = 12

50% = 120

100% = 240

I hope this helped!

<!> Brainliest is appreciated! <!>

- Zack Slocum

*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆

8 0
3 years ago
Read 2 more answers
Jasmine has $4.90 in quarters, dimes, nickels, and pennies. She has 2 more dimes than
marishachu [46]

Answer:

11

Step-by-step explanation:

5 0
3 years ago
A tank containing 64 gallons lost 6 1/4% of this through leakage how much is remaining is the tank
jolli1 [7]

if we take 64 to be the 100%, how much is 6¼% off of it?

\bf \begin{array}{ccll} amount&\%\\ \cline{1-2} 64&100\\ x&6\frac{1}{4} \end{array}\implies \cfrac{64}{x}=\cfrac{100}{6\frac{1}{4}}\implies \cfrac{64}{x}=\cfrac{\frac{100}{1}}{\frac{25}{4}}\implies \cfrac{64}{x}=\cfrac{100}{1}\cdot \cfrac{4}{25} \\\\\\ \cfrac{64}{x}=16\implies 64=16x\implies \cfrac{64}{16}=x\implies 4=x \\\\[-0.35em] ~\dotfill\\\\ \stackrel{\textit{it had}}{64}-\stackrel{\textit{leakage}}{4}\implies \stackrel{\textit{remaining}}{60}

4 0
3 years ago
Read 2 more answers
Juan was given a gift card for a coffee shop. Each morning, Juan uses the card to buy one cup of coffee. Each cup of coffee cost
Black_prince [1.1K]

Answer:

A=30-2x

Step-by-step explanation:

Cost of one cup of coffee=$2

The original amount of money on the gift card= $30

Juan's expenses in buying coffee, after x morning are \$2\times x.

The amount of money left, A, on the card = (Original amount) - (Total expenses)

A=30-2x

Hence, the equation for, A, the amount of money remaining on the card is

A=30-2x.

7 0
3 years ago
Other questions:
  • The perimeter of rectangle ABCD is 42 cm and the area is 80 cm2. Which equation can be used to find the dimensions of the rectan
    10·1 answer
  • I’m so confused, can someone help me out?
    14·1 answer
  • Helppplzzzzzzzzzz.....
    6·1 answer
  • Luke 840 eggs in one hour The graph shows the time and number of eggs Daphe ate.
    6·1 answer
  • There are 5 soft pretzels shared equally between 8 people. What fraction of a soft pretzel does each person receive?
    6·1 answer
  • How do you compare ratios with the same denominator
    12·1 answer
  • Expand the expression and combine like terms. Show your work.<br><br> 1.6x−12(3.8x+0.04)
    5·1 answer
  • In 65% of 500=n, what is n?
    11·1 answer
  • Using the tools in GeoGebra, measure and to confirm the results found in part C. Take a screenshot of your image showing the ang
    6·1 answer
  • A prism with a base that is a regular hexagon
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!