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tia_tia [17]
4 years ago
13

Find the circumference and the area of a circle with radius 3m.

Mathematics
1 answer:
Diano4ka-milaya [45]4 years ago
7 0

Answer:

area: 28.26m^2      circumference: 18.84

Step-by-step explanation:

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2/3=n/12<br><br> solve the proportion
Natali [406]

Answer: n=8

<u>Cross-multiply</u>

<u></u>2/3=n/12<u></u>

<u></u>(2)*(12)=n*(3)<u></u>

<u></u>24=3n<u></u>

<u></u>

<u>Flip the equation</u>

<u></u>24=3n---->3n=24<u></u>

<u></u>

<u>Divide both sides by 3</u>

<u></u>3n/3=24/3<u></u>

<u></u>24/3=8----> n=8<u></u>

5 0
3 years ago
Does someone mind helping me with this problem? Thank you!
Sonbull [250]

Answer:

78

Step-by-step explanation:

= 12 x^2 - 30         put in ' - 3 ' for  'x'

= 12 ( -3 )^2 - 30

 = 12 (9) - 30 = 78

6 0
2 years ago
Read 2 more answers
The following data set represents the salaries of all seven employees at a small start-up company (expressed in thousands of dol
bogdanovich [222]

Answer:

<h2>9.96</h2>

Step-by-step explanation:

If the data set represents the salaries of all seven employees at a small start-up company (expressed in thousands of dollars). 23, 25, 40, 45, 45, 23, 23 in thousands dollars with variance of 99.14, to get the standard deviation, the formula below will be applicable.

Variance = (standard deviation)²

substituting Variance = 99.14 into the equation we wil have;

99.14 = (standard deviation)²

taking the square root of both sides;

√99.14 = √(standard deviation)²

standard deviation = √99.14

standard deviation = 9.96

The standard deviation of the set of datas is 9.96

3 0
3 years ago
What's 20 times 2 and add 4?
Tanya [424]

Answer:

20*2 is 40

add 4?

its 44

3 0
3 years ago
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Which number produces a rational number when multiplied by 0.25?
laiz [17]
The number is 2/9 hope that helps!
7 0
3 years ago
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