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Kipish [7]
3 years ago
10

A cube has a side length of 14 meters. What is the volume of the cube?

Mathematics
2 answers:
Tems11 [23]3 years ago
5 0
The answer is A

I hope this helps
Rudiy273 years ago
4 0
V=s^3
V=14^3
V=196*14
V=2744 cubic feet.

The answer is A.
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Please please help me with this question please now and show your steps
sattari [20]

Answer:

y =  {x}^{2}  - 8x + 7 \\ a = 1 \: and \: b = -  8 \\ the \: line \: of \: symmetry \:  \\ x =  \frac{ - b}{2a}  =  \frac{8}{2}   \\ x = 4(line \: of \: symmetry) \\ y =  {4}^{2}  - 8(4) + 7  \\ = 16 + 32 + 7 = y = 55 \\ vertix \: is \: (4  ,55) \\ y =  {0}^{2}  - 8(0) + 7 \\ y = 7 \\ 0 =  {x}^{2}  - 8x + 7 \\ (x - 7)(x - 1) = 0

6 0
2 years ago
Lightbulbs of a certain type are advertised as having an average lifetime of 750 hours. The price of these bulbs is very favorab
Katyanochek1 [597]

Answer:

(a) Customer will not purchase the light bulbs at significance level of 0.05

(b) Customer will purchase the light bulbs at significance level of 0.01 .

Step-by-step explanation:

We are given that Light bulbs of a certain type are advertised as having an average lifetime of 750 hours. A random sample of 50 bulbs was selected,  and the following information obtained:

Average lifetime = 738.44 hours and a standard deviation of lifetimes = 38.2 hours.

Let Null hypothesis, H_0 : \mu = 750 {means that the true average lifetime is same as what is advertised}

Alternate Hypothesis, H_1 : \mu < 750 {means that the true average lifetime is smaller than what is advertised}

Now, the test statistics is given by;

       T.S. = \frac{Xbar-\mu}{\frac{s}{\sqrt{n} } } ~ t_n_-_1

where, X bar = sample mean = 738.44 hours

               s  = sample standard deviation = 38.2 hours

               n = sample size = 50

So, test statistics = \frac{738.44-750}{\frac{38.2}{\sqrt{50} } } ~ t_4_9

                            = -2.14

(a) Now, at 5% significance level, t table gives critical value of -1.6768 at 49 degree of freedom. Since our test statistics is less than the critical value of t, so which means our test statistics will lie in the rejection region and we have sufficient evidence to reject null hypothesis.

Therefore, we conclude that the true average lifetime is smaller than what is advertised and so consumer will not purchase the light bulbs.

(b) Now, at 1% significance level, t table gives critical value of -2.405 at 49 degree of freedom. Since our test statistics is higher than the critical value of t, so which means our test statistics will not lie in the rejection region and we have insufficient evidence to reject null hypothesis.

Therefore, we conclude that the true average lifetime is same as what it has been advertised and so consumer will purchase the light bulbs.

6 0
3 years ago
Kate can run 5 blocks per minute she wants to run 80 blocks how long will it take her to finish if she has already run 20 blocks
ki77a [65]

12 minutes because 80-20 is 60 and 60 divides by 5 is 12

3 0
3 years ago
Read 2 more answers
A teacher polled only the 8th grade students in English classrooms on what their favorite color is. She found that the favorite
Sergeeva-Olga [200]
Self-selected sample
7 0
3 years ago
Read 2 more answers
. A grocery store clerk put only packages of flour tortillas and packages of corn tortillas on a shelf. The ratio of the number
KengaRu [80]

Answer: It should be 18...(Multiple of 9)

Step-by-step explanation:

3 0
3 years ago
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