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mel-nik [20]
3 years ago
14

Joshua uses his thermometer and finds the boiling point of ethyl alcohol to be 75 degrees Celsius. He looks in a reference book

and finds that the actual boiling point of ethyl alcohol is 80 degrees Celsius. What is his percent error?
Mathematics
1 answer:
MissTica3 years ago
4 0

Answer:

6.25%

Step-by-step explanation:

Percent error is calculated by taking the difference of measured value and correct value divided by correct value and multiplied by 100%.

Mathematically,

Percent error = (correct value - measured value)/correct value  * 100%

_________________________________________________

in the problem given

measured value = 75 degrees Celsius

correct value = 80 degrees Celsius ( as given in reference book)

thus,

Percent error = (80 - 75)/80 * 100%

Percent error = (5/80 )* 100% = 6.25%

Percent error calculated by him is  6.25%.

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John gives 2/3 of his pencils, P, to Roy and then gives 1/4 of the pencils that he has left to Maria. In terms of P, how many pe
valkas [14]

Answer:

C. 1/4

Step-by-step explanation:

Since John has given 2/3 of his pencils to Roy, he has 1/3 of the total left. To find 1/4 of 1/3, multiply the numbers. 1/4(1/3) = 1/12. This means that he gave 1/12 of the beginning total to Maria. 2/3 can also be written as 8/12, and 1 can be written as 12/12. 12/12 - 8/12 = 4/12, and then 4/12 - 1/12 = 3/12. 3/12 can be simplified into 1/4

4 0
2 years ago
Read 2 more answers
Which number line shows the solution of -4x+ 6> 18?
Cloud [144]

Consider the below figure attached with this question.

Given:

-4x+6>18

To find:

The number of line that represents the solution of given inequality.

Solution:

We have,

-4x+6>18

Subtracting 6 from both sides, we get

-4x>18-6

-4x>12

If an inequality is multiplied or divide by a negative number, then the sign of inequality must be change.

Divide both sides by -4.

x

x

The value of x is less than -3. It means number of the left of -3 are included in the solution set but -3 is not included in the solution set.

So, there is an open circle at x=-3 on the number and an arrow from -3  towards left.

Therefore, the correct option is A.

6 0
2 years ago
Carlo attends art class every 4 weeks, chess club every 2 weeks, and fencing lessons every 3 weeks. If he attended all three thi
BartSMP [9]

Answer:

12 weeks

Step-by-step explanation:

idk just guessing

4 0
3 years ago
Read 2 more answers
Answer C,D,E,F<br><br><br>Snsjma
Ulleksa [173]

Answer:

f) 97° = m∠6

e) 83° = m∠5

d) 83° = m∠4

c) 97° = m∠3

b) 97° = m∠2

a) 83° = m∠1

Step-by-step explanation:

  • m∠5 ≅ m∠4; Angle Correspondence Theorem
  • m∠5 ≅ m∠1; Alternate Interior Angles Theorem
  • m∠6 ≅ m∠2; Alternate Exterior Angles Theorem
  • 180° = m∠2 + m∠1; Definition of Linear Pair [Supplementary Angles]
  • 180° = m∠5 + m∠3; Definition of Linear Pair [Supplementary Angles]

I am joyous to assist you anytime.

6 0
3 years ago
Bob and Laquisha have volunteered to serve on the Junior Prom Committee. The names of twenty volunteers,
Law Incorporation [45]

Answer:

1/380

Step-by-step explanation:

<u>Probability of Bob's name drawn first is:</u>

  • 1/20                            as there are 20 people with equal chance

<u>And probability of Laquisha's name drawn second is: </u>

  • 1/19                            as there are 19 people left with equal chance

<u>Probability of the two events happening is: </u>

  • 1/20*1/19 = 1/380       product of individual probabilities
3 0
3 years ago
Read 2 more answers
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