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tresset_1 [31]
2 years ago
10

find the area of a circle, take π to be 3.142 and give your answer to one decimal place. the radius is 4cm

Mathematics
1 answer:
Ivan2 years ago
4 0

Answer:

A≈50.27

hope this helps you

You might be interested in
6.81 is what percent of 45.5
frosja888 [35]

To get the solution, we are looking for, we need to point out what we know.

1. We assume, that the number 45.5 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 45.5 is 100%, so we can write it down as 45.5=100%.

4. We know, that x is 6.81% of the output value, so we can write it down as x=6.81%.

5. Now we have two simple equations:

1) 45.5=100%

2) x=6.81%

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

45.5/x=100%/6.81%

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.


7. Solution for what is 6.81% of 45.5


45.5/x=100/6.81

(45.5/x)*x=(100/6.81)*x       - we multiply both sides of the equation by x

45.5=14.684287812041*x       - we divide both sides of the equation by (14.684287812041) to get x

45.5/14.684287812041=x

3.09855=x

x=3.09855

now we have:

6.81% of 45.5=3.09855

Hope this helps!

4 0
3 years ago
Read 2 more answers
What is the final amount if 893 is decreased by 2% followed by a further 7% decrease?
Ahat [919]

Answer 62 because if you work it out it wi give it

6 0
2 years ago
Tulong nmn po plsss​
mylen [45]

Answer:

tohw9

ufpa

Step-by-step explanation:

jfapn

abjllj shllhphkvq gohahogsv 79qy75j

7 0
3 years ago
From sea level, a submarine descends 20 feet per minute. Where is the submarine in relation to sea level 5 minutes after it star
Katen [24]
The correct answer is C.) 100 feet

(Feet per minute) x (number of minutes)

20x5 = 100
4 0
3 years ago
Multiply.<br> (5x2-6x+2) x (4x2-3x)
stich3 [128]

Answer:

<em>18x² - 84x + 96</em>

Step-by-step explanation:

(5 × 2 - 6x + 2) × (4 × 2 - 3x)

5 × 2 (4 × 2 - 3x) - 6x(4 × 2 - 3x) + 2(4 × 2 - 3x)

80 - 30x - 6x(4 × 2 - 3x) + 2(4 × 2 - 3x)

80 - 30x - 48x + 18x² - 6x

96 - 84x + 18x²

18x² - 84x + 96

Hope this helps! :)

6 0
2 years ago
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