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3 years ago

10

HELP YALL PLEASE! I WILL MARK BRAINIEST TO WHOEVER IS CORRECT!!

1 answer:

Musya8 [376]3 years ago

4 0

Answer:

Line 1: Is parallel Line 2: Is Neither Line 3: Is parallel

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A sphere has a volume of 4500 cubic inches. What is the radius off the shpere

Goshia [24]

Answer:

The radius of sphere with volume 4500 cubic inches is 10.24 inches.

Step-by-step explanation:

Let V be the volume of the sphere

Given

Volume of sphere = V = 4500 cubic inches

Let r be the radius of the sphere

The volume of the sphere is given by the formula

$V = \frac{4}{3}\pi r^3$

Putting the known values

$4500 = \frac{4}{3} * \frac{22}{7} * r^3\\4500 = \frac{88}{21} * r^3\\r^3 = \frac{21}{88} * 4500\\r^3 = 1073.8636$

Taking cube root on both sides

$\sqrt[3]{r^3} = \sqrt[3]{1073.8636} \\r = 10.2403$

Rounding off to nearest hundredth

The radius is: 10.24 inches.

Hence,

The radius of sphere with volume 4500 cubic inches is 10.24 inches.

8 0

3 years ago

The mean life of a particular brand of light bulb is 1200 hours. If you know that at about 95% of this brand of bulbs will last

Pachacha [2.7K]

Answer:

c) 50

Step-by-step explanation:

We have been given that the mean life of a particular brand of light bulb is 1200 hours. About 95% of this brand of bulbs will last between 1100 and 1300 hours.

We will use z-score formula to solve our given problem.

$z=\frac{x-\mu}{\sigma}$ , where,

$z=\text{z-score}$ ,

$x=\text{Sample score}$ ,

$\mu=\text{Mean}$ ,

$\sigma=\text{Standard deviation}$

We know that 95% of data points lies within two standard deviation of mean, so 1100 will correspond to a z-score of -2 and 1300 will correspond to a z-score of 2.

$-2=\frac{1000-1200}{\sigma}$

$-2=\frac{-100}{\sigma}$

$\sigma=\frac{-100}{-2}$

$\sigma=50$

We can use sample score 1300 and get same answer as:

$2=\frac{1300-1200}{\sigma}$

$2=\frac{100}{\sigma}$

$\sigma=\frac{100}{2}$

$\sigma=50$

Therefore, the standard deviation of the light bulbs’ life is 50 years.

4 0

4 years ago

What's the square footage of 24 by 17

WINSTONCH [101]

To do this question you need to multiply base times height. So it would be 24*17. After that, you should get 408 square feet.

8 0

3 years ago

Please I really need help!!! Can someone pls help me??

Tom [10]

A: angle E B: angle P

7 0

3 years ago

What is the cube root of 27a12

satela [25.4K]

Answer:

$3a^4$

Step-by-step explanation:

Given expression is $27a^{12}$ .

Now we need to find the cube root of given expression $27a^{12}$ .

$\sqrt[3]{27a^{12}}$

$=\sqrt[3]{3*3*3a^{4*3}}$

$=\sqrt[3]{3^3\left(a^4\right)^3}$

$=\sqrt[3]{\left(3a^4\right)^3}$

Since cube root and cube are opposite operations of each other. So they will cancel each other.

$=3a^4$

Hence correct choice is the last choice $3a^4$ .

8 0

3 years ago