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
15000(0.068÷12)(1+0.068÷12)^12×4(1+0.068÷12)^12×4 -1​
zhuklara [117]

Answer: 1556.52935024

Step-by-step explanation: Pemdas

According to Khan Academy, "The order of operations is a rule that tells the correct sequence of steps for evaluating a math expression. We can remember the order using PEMDAS: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right)."

7 0
2 years ago
In the diagram,
forsale [732]

Answer:

Probability that the measure of a segment is greater than 3 = 0.6

Step-by-step explanation:

From the given attachment,

AB ≅ BC, AC ≅ CD and AD = 12

Therefore, AC ≅ CD = \frac{1}{2}(\text{AD})

                                  = 6 units

Since AC ≅ CD

AB + BC ≅ CD

2(AB) = 6

AB = 3 units

Now we have measurements of the segments as,

AB = BC = 3 units

AC = CD = 6 units

AD = 12 units

Total number of segments = 5

Length of segments more than 3 = 3

Probability to pick a segment measuring greater than 3,

= \frac{\text{Total number of segments measuring greater than 3}}{Total number of segments}

= \frac{3}{5}

= 0.6

4 0
3 years ago
In this equation What is 77+23
kondaur [170]
The answer is 100 I’m sure
3 0
3 years ago
Read 2 more answers
I really need help!!
11111nata11111 [884]
283.80x0.33% =93.654
3 0
3 years ago
Read 2 more answers
1. ΔABC and ΔDEF are similar = Given
deff fn [24]
I think the answer is d. The slope of AC=Slope of DF.

Hope this helped☺☺
3 0
3 years ago
Read 2 more answers
Other questions:
  • Help mee <br><br> 3(2x + 5) - 3 =
    6·2 answers
  • What number is 33% of 360 equation
    8·2 answers
  • In the diagram shown, the distance between points A and C is the same as the distance between points B and G.
    5·2 answers
  • Solve for x in the equation x2 + 14x+17--96
    7·1 answer
  • 74 decreased by twice
    6·1 answer
  • ryan meausures the perimeter of his square painting so he can make a wood frame find the perimeter of the painting in centimeter
    12·1 answer
  • What is 3/8+1/8 in a single fraction
    9·2 answers
  • What is the area of the trapezoid shown below?
    11·2 answers
  • •) Zeeshaan bought 12 kilograms of wheat seeds and 18 kilograms of rice seeds. How many kilograms of seeds did he buy ?​
    10·1 answer
  • Solve for x<br> 8 (x – 3) + 7 = 26x
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!