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2 years ago

Can someone help me. What number is it can anyone help?

Mathematics

2 answers:

Thepotemich [5.8K]2 years ago

5 0

Step-by-step explanation:

2k=3×4

2k=12

2k/2=12/2

k=6

atroni [7]2 years ago

3 0

Answer:

k = 6

Step-by-step explanation:

In Ratio Questions , The Denominator takes the same Ratio as the Numerator and vice versa

so for Question , 4 is double 2

Then k must be double of 3

Then k=2*3 = 6

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cestrela7 [59]

<h3><u>Given :- </u></h3>

$A=\left[\begin{array}{ccc}1&4\\5&6\\\end{array}\right]$
a $_{ij}$ = 6

Value of i and j

<h3><u>Solution:- </u></h3>

$\longrightarrow$ In a matrix the the the position of an element is determined by using a $_{ij}$ where i the number of row and j is number of column in which the element is.

$\leadsto$ Since 6 is in 2nd column and 2nd row <u>,</u> it's position can be written as a $_{22}$

<u>Comparing with</u> a $_{ij}$

i = 2
j = 2

6 0

3 years ago

A research scientist wants to know how many times per hour a certain strand of bacteria reproduces. He wants to construct the 95

Galina-37 [17]

Answer:

The minimum sample size required for the estimate is 345.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.025 = 0.975$ , so Z = 1.96.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

The standard deviation is known to be 1.8.

This means that $\sigma = 1.8$

What is the minimum sample size required for the estimate?

This is n for which M = 0.19. So

$M = z\frac{\sigma}{\sqrt{n}}$

$0.19 = 1.96\frac{1.8}{\sqrt{n}}$

$0.19\sqrt{n} = 1.96*1.8$

$\sqrt{n} = \frac{1.96*1.8}{0.19}$

$(\sqrt{n})^2 = (\frac{1.96*1.8}{0.19})^2$

$n = 344.8$

Rounding up to the next integer:

The minimum sample size required for the estimate is 345.

8 0

3 years ago

Plz help got it wrong show work plz

igor_vitrenko [27]

Answer: C) $1951.53

<u>Step-by-step explanation:</u>

$A=P(1+r)^{t}$

A is amount accrued (final balance)
P is the Principal (original amount deposited)
r is the rate (in decimal form)
t is the number of years

A=1500(1+0.068)⁴

= 1500(1.068)⁴

= 1951.53

6 0

4 years ago

These tables represent a quadratic function with a vertex at (0, 3). What is the

astra-53 [7]

The answer is d . -97

7 0

2 years ago

The following data points represent the number of children in each household in Cam's neighborhood.

makkiz [27]

Answer:

Step-by-step explanation:

We can see that 9 households are represented in the data, 4 of them are zeros. This means 4 households in Cam's neighborhood have 0 children.

4 0

3 years ago