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GaryK [48]
3 years ago
6

A student was to find the area of a circle. By mistake he used the value 3.41 instead of 3.14, the value of pi; his answer was c

onsequently 10.2 too large. Find the radius of the circle.
Mathematics
2 answers:
julia-pushkina [17]3 years ago
6 0
<span>0.5 is the answer plz mark me as brainliest answer</span>
sammy [17]3 years ago
5 0
Area=pir²


areamistake=31.4r²
areactual=3.14r²

if
31.4r² is 10.2 bigger than 3.14r²
then
31.4r²=10.2+3.14r²
minus 3.14r² from both sides
28.26r²=10.2
divide both sides by 28.26
r²=0.36093418259023354564755838641189
squaer root both sides
r=0.60077798111301777772277024274837
about 0.6 units

the radius is 0.6 units

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Lelechka [254]
I think it’s like that but u shld wait for someone else to answer, cuz i’m not sure if im correct cuz the ans is so big

3 0
2 years ago
Click an item in the list or group of pictures at the bottom of the problem and holding the button down drag it into the correct
Fiesta28 [93]

Answer:

1/9

Step-by-step explanation:

0.1(repeating)

4 0
2 years ago
The average of 10 numbers is -5. A new number is added to the list making the average -6. What is the new number?
Shtirlitz [24]

Answer:

- 16

Step-by-step explanation:

Average is calculated as

average = \frac{total}{count}

Thus for the given 10 numbers we have

\frac{total}{10} = - 5 ( multiply both sides by 10 )

total = - 50

let the number added be x, then

\frac{total+x}{11} = - 6 ( multiply both sides by 11 )

total + x = - 66, that is

- 50 + x = - 66 ( add 50 to both sides )

x = - 16

The new number is - 16

4 0
3 years ago
What is an algebraic rule that describes 1,4,2,8,6,24,22
vitfil [10]

Answer:

Time 4 minus 2

Step-by-step explanation:

6 0
3 years ago
Use two 2-Column proofs to show that either diagonal of a rectangle will create two congruent triangles?
tangare [24]
<span>Given: Rectangle ABCD 
Prove: ∆ABD≅∆CBD 
Solution:
                      
           <span> Statement                                       Reason 
</span>
  ABCD is a parallelogram          Rectangles are parallelograms since the                                                          definition of a parallelogram is a quadrilateral                                                    with two pairs of parallel sides.

Segment AD = Segment BC       The opposite sides of a parallelogram are     Segment AB = Segment CD       congruent. This is a theorem about the                                                              parallelograms.

</span>∆ABD≅∆CBD                             SSS postulate: three sides of ΔABD is                                                           equal to the three sides of ∆CBD<span>


</span><span>Given: Rectangle ABCD 
Prove: ∆ABC≅∆ADC
</span>Solution:
                      
           <span> Statement                                       Reason 
</span>
    Angle A and Angle C                 Definition of a rectangle: A quadrilateral     
        are right angles                      with four right angles.

        Angle A = Angle C                 Since both are right angles, they are                                                                  congruent

Segment AB = Segment DC       The opposite sides of a parallelogram are     Segment AD = Segment BC       congruent. This is a theorem about the                                                              parallelograms.

            ∆ABC≅∆ADC                   SAS postulate: two sides and included                                                         angle of ΔABC is congruent to the two                                                         sides and included angle of ∆CBD
6 0
3 years ago
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