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Blizzard [7]
3 years ago
10

If the diameter of the circle is 6 cm, find its circumference. [Use 3.14 for π

Mathematics
1 answer:
loris [4]3 years ago
5 0
<h3><u>Given</u><u>:</u><u>-</u></h3>

Diameter of a circle = 6 cm.

So radius = 3 cm.

<h3><u>T</u><u>o</u><u> </u><u> </u><u>find</u><u>:</u><u>-</u></h3>

Circumference of the circle

✪ Circumference of circle = πr²

➾ Circumference = 3.14 × 3²

➾ Circumference = 3.14 × 9

<h3>∴ Circumference = 28.26 cm. <u>Ans</u><u>.</u></h3>
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If I can paint 96 sq ft in 15 minutes how long does it take to paint 1 sq ft
White raven [17]

It takes 0.15625 minutes to paint 1 square feet

<em><u>Solution:</u></em>

Given that, I can paint 96 sq ft in 15 minutes

To find: Time taken to paint 1 square feet

From given,

96 square feet is painted in 15 minutes

Let "x" be the time taken to paint 1 square feet

Then, we can say,

96 square feet = 15 minutes

1 square feet = x minutes

This forms a proportion and we can solve the sum by cross multiplying

96 \times x = 15 \times 1\\\\x = \frac{15}{96}\\\\x = 0.15625

Thus it takes 0.15625 minutes to paint 1 square feet

8 0
4 years ago
Eight thousand six and thirty-four thousandths<br> * Write as a decimal
valentinak56 [21]

Answer:

8,006.034

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5 0
3 years ago
Help me find Sample variance and standard deviation
AnnZ [28]
First, find the mean. You'll need it to compute the variance.

\bar x=\displaystyle\frac15\sum_{i=1}^5x_i=\dfrac{21+10+6+7+11}5=11

The variance of the sample is then computed with the formula

s^2=\displaystyle\dfrac1{5-1}\sum_{i=1}^5(\bar x-x_i)^2=\dfrac{(21-11)^2+\cdots+(11-11)^2}4=\dfrac{71}2=35.5

The standard deviation is the square root of the variance, so

s=\sqrt{35.5}\approx5.958
5 0
3 years ago
Can someone help me I really need it
Dennis_Churaev [7]

Answer:

The 3 lines are parallel.

Step-by-step explanation:

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Hope this helped! Please mark Brainliest.

8 0
3 years ago
Which is equivalent to cos^-1(0) answer in radian
ruslelena [56]

Answer:

Step-by-step explanation:

cos ^-1(0)=(2n+1) π/2

where n is an integer.

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8 0
3 years ago
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