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Olegator [25]
3 years ago
7

Which groups on the periodic table contain metalloids?​

Mathematics
2 answers:
natali 33 [55]3 years ago
7 0

Answer:

Group 13 to group 16

Step-by-step explanation:

Nikolay [14]3 years ago
3 0

Answer: C

Step-by-step explanation:

The answer for K12

took the test

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A rare form of malignant tumor occurs in 11 children in a​ million, so its probability is 0.000011. Four cases of this tumor occ
Shkiper50 [21]

Answer:

a) The mean number of cases is 0.14608 cases.

b) The probability that the number of cases is exactly 0 or 1 is 0.990.

c) The probability of more than one case is 0.010

d) No, because the probability of more than one case is very small

Step-by-step explanation:

We can model this problem with a Poisson distribution, with parameter:

\lambda=r*t=0.000011*13,280=0.14608

a) The mean amount of cases is equal to the parameter λ=0.14608.

b) The probability of having 0 or 1 cases is:

P(k=0)=\frac{\lambda^0 e^{-\lambda}}{0!}=\frac{1*0.864}{1} =0.864\\\\ P(k=1)=\frac{\lambda^1 e^{-\lambda}}{0!}=\frac{0.14608*0.864}{1} =0.126\\\\P(k\leq1)=0.864+0.126=0.990

c) The probability of more than one case is:

P(k>1)=1-P(k\leq 1)=1-0.990=0.010

d) The cluster of 4 cases can not be due to pure chance, as it is a very high proportion of cases according to the average rate. Just having more than one case has a probability of 1%.

7 0
3 years ago
Hey I could use some help on this assignment
Zarrin [17]

Answer:

None of these

Step-by-step explanation:

that's what i got

5 0
2 years ago
Let S represent the amount of steel produced (in tons). Steel production is related to the amount of labor used (L) and the amou
natima [27]

Answer:

THE AMOUNT OF LABOR TO BE USED  IS 2,244.28

THE AMOUNT OF CAPITAL TO BE USED IS 2,619.33

THE MINIMUM PRODUCTION COST IS $374,047

Step-by-step explanation:

PLEASE CHECK ATTACHMENT FOR COMPLETE SOLUTION AND STEP BY STEP EXPLANATION

4 0
3 years ago
4x²-12x+9 = 5
kati45 [8]

Answer:

x = 3/2 ± \sqrt{5} /2

Step-by-step explanation:

4x²-12x+9 = 5

Rearrange:

4x²-12x+4 = 0

Solve using the quadratic equation:

x = 3/2 ± \sqrt{5} /2  

8 0
2 years ago
Which equation represents the line shown on the graph?
Vikki [24]

Answer:

I belive it would be either y = 2x or y = x + 2

I think its y = 2x

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
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