3 cm, 7 cm, 7 cm, 7 cm, 9 cm, 11 cm, 12 cm what is the mean of the data set?

Mathematics

2 answers:

yarga [219]3 years ago

6 0

Answer: 8cm

Step-by-step explanation:

To calculate the mean , we will sum up all the data given and divide by the total number , that is

mean = $3+7+7+7+9+11+12 / 7$

$= 56/7$

$=8$

Therefore:

mean = $8cm$

lisabon 2012 [21]3 years ago

5 0

Answer:

The mean for this question is 8.

Step-by-step explanation:

You add 3+7+7+7+9+11+12 which would equal 56then, you would divide it by how ever many numbers there are so in this case you would divide it by 7.

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Find the surface area of a sphere with a volume of 36π in3.

swat32

First use known volume to solve for radius:
$V=\frac{4}{3}\pi r^{3}$
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$r=\sqrt[3]{\frac{3(36\pi)}{4\pi}}$
$r=\sqrt[3]{27}$
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Then use the radius to get the surface area:
$A_{surf}=4 \pi r^{2}$
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$A_{surf}=4 \pi 9$
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