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Lina20 [59]
3 years ago
14

4/3 ×π×7×7×7. Leave your answer in pi.​

Mathematics
2 answers:
Alina [70]3 years ago
6 0

Answer:

1436.8

Step-by-step explanation:

In pi it is = 1372/3 pi

RoseWind [281]3 years ago
4 0

Answer:

Step-by-step explanation:

\frac{4}{3}*\pi *7*7*7=\frac{1372}{3}*\pi \\\\\=457.33\pi

Multiply 4*7*7*7 = 1372

Divide 1372 by 3

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What is the next three terms in 64, -16, 4
IrinaK [193]
-1, 1/4, - 1/16 are the next three terms, because the pattern is to divide the first term by -4 to get the second term.

hope it helps, brainliest pls
7 0
3 years ago
Evaluate the expression for n = 8.<br> 6(n + 1) =?
e-lub [12.9K]

Answer:

54

Step-by-step explanation:

n = 8

6(n + 1)

6(8 + 1)

6(9)

54

7 0
3 years ago
A certain brand of refrigerator has a useful life that is normally distributed with mean 10 years and standard deviation 3 years
juin [17]

Answer: 0.55567

Step-by-step explanation:

Given : A certain brand of refrigerator has a useful life that is normally distributed with mean 10 years and standard deviation 3 years. The useful lives of these refrigerators are independent.

i.e.

\mu=10\text{ years}\\\sigma=3\text{ years}

Let X_1 and X_2 are two randomly selected refrigerator's life whose sum will exceed third selected refrigerator X_3 .

So that, X =X_1+X_2-1.9\times X_3

Mean =E(X_1)+E(X_2)-E(X_3)=10+10-1.9\times10 =1

Standard deviation =\sqrt{(Var(X_1)+Var(X_1)+Var(X_1))}

=\sqrt{(3^2+3^2+(1.9\times3)^2)}

=7.1056315694

Z-score : z=\dfrac{X-E[x]}{\sqrt{Var[x]}}=\dfrac{0-1}{7.0156315694}\approx-0.14

Now , The  probability that the total useful life of two(i..e n=2) randomly selected refrigerators will exceed 1.9 times the useful life of a third randomly selected refrigerator would be :-

P(Z>-0.14)=P(Z

Hence, the required probability is 0.55567.

3 0
3 years ago
Which statement is true about the expression 12-7+3
Amiraneli [1.4K]
The answer to the question is 8
6 0
3 years ago
Read 2 more answers
The Thomas Supply Company Inc. is a distributor of gas-powered generators. As with any business, the length of time customers ta
Dmitry [639]

Answer:

The answer is below

Step-by-step explanation:

When computing quartile and decile, the data must be arranged in ascending order.

Given the data points:

13 13 13 20 26 26 29 31 34 34 35 35 36 37 38  41 41 41 42 43 46 47 48 49 53 55 56 62 67 82

The numbers are arranged in ascending order. The total number of terms is 30.

a)

First \ quartile(Q_1)=\frac{1}{4}(n+1)^{th}\  term\\\\where\ n=number\ of\ terms. Hence:\\\\Q_1=\frac{1}{4}(30+1)=7.75^{th}\ term=average\ of\ 7th\ and\ 8th\ term=\frac{29+31}{2} =30\\\\Q_1=30\\\\Third \ quartile(Q_3)=\frac{3}{4}(n+1)^{th}\  term\\\\Q_3=\frac{3}{4}(30+1)=23.25^{th}\ term=average\ of\ 23rd\ and\ 24th\ term=\frac{48+49}{2} =48.5\\\\Q_3=48.5

b)

Second \ decile(D_2)=\frac{2}{10}(n+1)^{th}\  term\\\\where\ n=number\ of\ terms. Hence:\\\\D_2=\frac{2}{10}(30+1)=6.2^{th}\ term=average\ of\ 6th\ and\ 7th\ term=\frac{26+29}{2} =27.5\\\\D_2=27.5\\\\\\Eight \ decile(D_8)=\frac{8}{10}(n+1)^{th}\  term=\frac{8}{10}(30+1)=24.8^{th}\ term\\=average\ of\ 24th\ and\ 25th\ term=\frac{49+53}{2} =51\\\\D_8=51

6 0
3 years ago
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