3 years ago

5 Which fraction is equivalent to 20 ? N

Mathematics

2 answers:

Maksim231197 [3]3 years ago

3 0

Answer:

4/20

Step-by-step explanation:

AnnyKZ [126]3 years ago

3 0

I believe the fraction 1/5 is equivalent to 20.

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How to use the results of part (b) and appropriate computation formulas to compute the sample variances s2 and sample standard d

anygoal [31]

$s^2=\displaystyle\sum\frac{(x-\bar x)^2}{n-1}=\frac1{n-1}\sum(x^2-2x\bar x+{\bar x}^2)=\frac{\displaystyle\sum x^2-2\bar x\sum x+{\bar x}^2}{n-1}$

where $\bar x=22$ is the mean. Since

$\sum x^2=2568$
$\sum x=110$

you have variance

$s^2=\dfrac{2568-2(22)(110)+22^2}{5-1}=37$

and so the standard deiviation is

$s=\sqrt{37}\approx6.083$

7 0

3 years ago

The following equation represents the number of fish in a pond, F(x), after x number of weeks. F(x) = 500 (1.2)x. How many fish

Shalnov [3]

Answer:

1) d. 2400

2) d.4200

Step-by-step explanation:

As per given data:

F(x) represents number of fish

x represents number of weeks

Relation between F(x) and x is given as

F(x)= 500 (1.2)x

Now part 1:

How many fish are in the pond after 4 weeks=?

x=4

Putting in given equation F(x)= 500 (1.2)x

F(x)= 500(1.2)(4)

= 2400

Now part 2:

How many fish are in the pond after 7 weeks?

x=7

Putting in given equation F(x)= 500 (1.2)x

F(x)= 500(1.2)(7)

= 4200 !

7 0

2 years ago

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An observer 12 m away from the foot of tree observes that the angle of elevation is 30° find the height of tree

lilavasa [31]

Answer:

in drawing

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

Does anyone know this?

maksim [4K]

I think its 24% because .24 x 50 is 12 but I could be doing it wrong, sorry I can't say for sure.

4 0

2 years ago

F(x)=x3−12x2+22x+100

miv72 [106K]

Answer:

X3+76+22x the 3 goes on top of the x

Step-by-step explanation:

x3-24+22x+100

x3+(-24+100)+22x

x3+76+22x

4 0

2 years ago