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3 years ago

Which of the following are square roots of the number below? Check all that apply.

1 answer:

6 0

E and D.

When squaring a number, the sign winds up positive regardless.

Also, note that when taking a square root, the answer always involves positives and negatives.

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What solid is generated when the semicircle is rotated about the line?

ddd [48]

The answer is hollow sphere

4 0

3 years ago

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If the end points of the diameter of a circle at (8,6) and (2,0), what is the standard form equation of the circle

pychu [463]

The answer is... y=x-2
have a great day!!!

8 0

3 years ago

Calculate the sample standard deviation of data from Question 1<br> 76,45,64,80,92

mash [69]

Answer:

$S.D = 15.98$

Step-by-step explanation:

Given: 76,45,64,80,92

Required: Determine the standard deviation

We start by calculating the mean

$Mean = \frac {\sum x}{n}$

Where x-> 76,45,64,80,92 and n = 5

$Mean = \frac {76+45+64+80+92}{5}$

$Mean = \frac{357}{5}$

$Mean = 71.4$

Subtract Mean (71.4) from each of the given data

$76 - 71.4 = 4.6\\45 - 71.4 = -26.5\\64 - 71.4 = -7.4\\80 - 71.4 = 8.6\\92 - 71.4 = 20.6$

Determine the absolute value of the above result

$|4.6| = 4.6\\|-26.5| = 26.5\\|-7.4| = 7.4\\|8.6| = 8.6\\|20.6| = 20.6$

Square Individual Result

$4.6^2 = 21.16 \\26.5^2 = 702.25\\7.4^2 = 54.76\\8.6^2 = 73.96\\20.6^2 = 424.36$

Calculate the mean of the above result to give the variance

$Mean = \frac {\sum x}{n}$

$Mean = \frac{21.16 + 702.25 + 54.76 + 73.96 + 424.36}{5}\\Mean = \frac{1276.49}{5}\\Mean = 255.298$

Hence, Variance = 255.298

Standard Deviation is calculated by $\sqrt{Var}$

$SD = \sqrt{255.298}$

$S.D = 15.9780474402$

$S.D = 15.98 (Approximated)$

6 0

3 years ago

If a fish is swimming 20 feet below the surface of the ocean and a bird flying directly overhead of the fish is 12 feet above th

kow [346]

Answer:

32 feet

Step-by-step explanation:

The equation would be 12 - (-20)

12 + 20 = 32

7 0

3 years ago

A die with faces numbered 1 to 6 is rolled once .what is the probability of obtaining 1 or 4

Radda [10]

Answer:

the answer is 2/6

Step-by-step explanation:

2 chances out of 6 events.

4 0

3 years ago

Read 2 more answers