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Galina-37 [17]
3 years ago
9

Need help 10 points

Mathematics
1 answer:
Citrus2011 [14]3 years ago
3 0

Answer:

50.24

Step-by-step explanation:

8 is the radius of the circle, so using A=πr^2, the equation would be A=(3.14*8^2)/4

(Dividing by 4 because we are solving for 1/4 of a circle, and substituting pi for 3.14)

(3.14*8^2)=200.96

200.96/4=50.24

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Joshua uses his thermometer and finds the boiling point of ethyl alcohol to be 75.0°C. He looks i a reference book and finds tha
aniked [119]

The percent error is 6.25%

Step-by-step explanation:

Percent error is given by:

Percent\ Error=\frac{|Experimental\ Value -\ Accepted\ value|}{Accepted\ value}*100

Here,

Accepted value = 80.0°C

Experimental Value = 75.0°C

Putting the values in the formula

Percent\ Error=\frac{|80.0 -75.0}{80.0}*100\\=\frac{|5.0|}{80.0}*100\\=\frac{5.0}{80.0}*100\\=0.0625*100\\=6.25\%

Hence,

The percent error is 6.25%

Keywords: Percentage, Error

Learn more about percent error at:

  • brainly.com/question/4401748
  • brainly.com/question/4459688

#LearnwithBrainly

8 0
4 years ago
Rectangle abcd is similar to rectangle pqrs given that ab =14cm bc =8cm and pq=12cm calculate the length of qr
ohaa [14]

Answer: 6.8571 (Round as needed)

Hope this is correct

Step-by-step explanation:

This is a simple ratio problem

Using the similarity statement we can say 14:12, (ab:pq)

That is our ratio.

So we do 14/12 = 8/x, we solve this using algebra to get our answer.

Hope this is correct.

7 0
3 years ago
I’m confused on this and I need help
Paraphin [41]

Answer:

it would be the 4th one

Step-by-step explanation:

0 would be the flat surface of the earth, but since the hiker is below the 0, it would be a negative 25

7 0
3 years ago
Together, Ashley and Gabby watched a total of 14 hours of television over the weekend. Ashley watched 6 times as many hours as G
Rainbow [258]

Answer:

The number of times over the Weekend that:

Ashley watched TV = x = 12 hours

Gabby watched TV = y = 6 hours

Step-by-step explanation:

Let us represent:

The number of times

Ashley watched TV = x

Gabby watched TV = y

Together, Ashley and Gabby watched a total of 14 hours of television over the weekend.

= x + y = 14..... Equation 1

x = 14 - y

Ashley watched 6 times as many hours as Gabby.

x = 6y

Using substitution method

We substitute 14 - y for x

14 - y = 6y

14 = 6y + y

14 = 7y

y = 14/7

y = 2 hours

Solving for x

x = 14 - y

x = 14 - 2

x = 12 hours

Therefore:

The number of times over the Weekend that:

Ashley watched TV = x = 12 hours

Gabby watched TV = y = 6 hours

6 0
3 years ago
What is the approximate circumference of the circle shown below?
Thepotemich [5.8K]

Answer:

the answer to this is C. 129 cm

4 0
3 years ago
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