Geometry please help

Answer:

A sample of 164 is needed.

Step-by-step explanation:

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

[tex]\alpha = \frac{1-0.8}{2} = 0.1[/tex]

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

So it is z with a pvalue of [tex]1-0.1 = 0.9[/tex], so [tex]z = 1.28[/tex]

Now, find the margin of error M as such

[tex]M = z*\frac{\sigma}{\sqrt{n}}[/tex]

In which [tex]\sigma[/tex] is the standard deviation of the population and n is the size of the sample.

How large of a sample is required to estimate the mean usage of water

We need a sample of n.

n is found when [tex]\sigma = 1.4, M = 0.14[/tex]. So

[tex]M = z*\frac{\sigma}{\sqrt{n}}[/tex]

[tex]0.14 = 1.28*\frac{1.4}{\sqrt{n}}[/tex]

[tex]0.14\sqrt{n} = 1.28*1.4[/tex]

[tex]\sqrt{n} = \frac{1.28*1.4}{0.14}[/tex]

[tex](\sqrt{n})^2 = (\frac{1.28*1.4}{0.14})^{2}[/tex]

[tex]n = 163.84[/tex]

Rounding up

A sample of 164 is needed.

Answer:

60

Step-by-step explanation:

50 x 6 = 300

40 x 6 = 240

300 - 240= 60

Answer:

( √675 - √363 )²

= (( 988 - ( √363 × 363 ))

= (( 988 - 131.769 ))

= - 130.781

The expression equivalent to the given one is - 130.781.

Those expressions who might look different but their simplified forms are same expressions are called equivalent expressions.

To derive equivalent expressions of some expression, we can either make it look more complex or simple,

We have given an expression;

( √675 - √363 )²

= (( 988 - ( √363 × 363 ))

= (( 988 - 131.769 ))

= - 130.781

Learn more about expression here;

https://brainly.com/question/14083225

#SPJ2

Answer:

false

Step-by-step explanation:

false

Answer: concentration = 15.58%

Step-by-step explanation:

Given: mass of sugar = 24 g = 24 ml   [ ∵ 1 g = 1 ml]

Volume of solution = Quantity of water + quantity of solute

= 130 +24 ml

= 154 ml

Concentration = [tex]\dfrac{mass\ of\ solute}{Volume\ of\ solution}\times100[/tex]

[tex]=\dfrac{24}{154}\times 100\\\\\approx15.58\%[/tex]

Hence, the concentration =15.58%

Answer:

The correct answer is,

[tex]x = \frac{65}{37} [/tex]

Answer:

Step-by-step explanation:

3[tex]x^{3}[/tex][tex](2y)^{2}[/tex]4[tex]x^{4}[/tex]

So I wrote down exactly above how the eq. is put in the question, note that the 2y is the only coefficient that is inside of the parenthesis,  I hope that is how the question is asked.  The 3 and 4 coefficient are NOT part of the exponential part.. is my point.. which will make a big difference if they were.  

anyway

3[tex]x^{3}[/tex]4[tex]y^{2}[/tex]4[tex]x^{4}[/tex]

48[tex]y^{2}[/tex][tex]x^{3}[/tex][tex]x^{4}[/tex]    ( b/c the x bases are the same we can just add the exponents)

48[tex]y^{2}[/tex][tex]x^{3+4}[/tex]

48[tex]y^{2}[/tex][tex]x^{7}[/tex]   ( this is your answer )

side note: an important learning point that was implied above is that you could rewrite the expression as 48[tex]y^{2}[/tex][tex]x^{2}[/tex][tex]x^{2}[/tex][tex]x^{2}[/tex][tex]x^{1}[/tex]... why would you want to write it that way?  b/c often a square is needed to make a problem work out easier.

as in  Cos^2(Ф) + Sin^2(Ф) = 1     but that's another question L :P

(if you're read this far.. good for  you.. if it's the 1st time you've heard of that rule for exponents then ask your teacher / professor if I can have 1/2 of their pay since I am doing their job  :D  )  

Answer:

46b-11

Step-by-step explanation:

Answer:

5% probability that the adult will exercise 30 minutes each day

Step-by-step explanation:

The exercise states that 5 percent of adults participate in at least 30 minutes from of exercise each day.

The interpretation of this is that if we choose a randomly selected adult, there is a 5% probability that the adult will exercise 30 minutes each day.

[tex] \bold {m = \frac{rise}{run} } \\ m = \frac{0 - ( -2)}{0 - 10} \\ m = \frac{0 + 2}{ - 10} \\ m = \frac{2}{ - 10} \\ m = - \frac{1}{5} [/tex]

[tex]y = mx + b \\ m = slope \\ b = y - intercept[/tex]

Because the graph passes origin point (0,0). Therefore the value of b is 0.

[tex] \large \boxed {y = - \frac{1}{5} x}[/tex]

Hey there!

We simply have to do 182/2.8, and you will get the area (65m^2).

We know that the formula for area is length x width, and the formula for volume is length x width x height. In the volume formula, we can see it can also be area x height to get volume. So, we know that area x height = volume, right? And in this equation, we are given volume and height. If          V = ha, with V = volume; h = height; a = area, we can divide "h" on both sides, and we get V/h = a, or volume divided by height is area. To solve for the above equation, we can plug the numbers in the formula: 182/2.8 = a, or 65 = a.

Hope this helps! Have an amazing day, and remember, you've got this!

Answer:

2.5

Step-by-step explanation:

The first equation (12÷1) represents the fraction one twelfth since it can be written as 1/12.

Hope it helps!

Answer:

The one that represents the fraction one twelfth is the 3rd option down 1 divided by 12

Step-by-step:

1 divided by 12 gives u the decimal for 1/12.

Answer:

A it's a because 45 x 10³ is 75

1 - Dependent Variable

2- 3x + 20 = 35

Answer:

Wyatt saves $26 if he uses the 5 for $8.15

Step-by-step explanation:

Answer:

63

Step-by-step explanation:

very far from thesecond largest number

hope this helps <3

Answer:

the answer is -10 over 21

Step by step explanation:

Circle numbers - 545 and 110 , 53

Underline - question - How much did they make on Tuesday?

Box - key words How Much

Evaluate and draw 545/110 = 5.95 per burger, so then you would multiply 53 x 5.95

Solve and check 53 x 5.95 = _______ your answer

Answer:

8.9

Step-by-step explanation:

1. DE:BC=AD:AB

2. AD=AB+BD, but according to the conditions AB=5, then

AD=5+BD.

3. after the substitution DE=16; BC=9; AB=5 and AD=5+BD into the formula:

16:9=(5+BD):5;

[tex]\frac{16}{9} =\frac{BD+5}{5};[/tex]

BD=80/9 - 5≈3.9.

4. if AD=AB+BD, then AD=5+3,9=8,9

Answer:

8.9 is your answer to the question

Answer:

the value of ƒ(5) is 19

Step-by-step explanation:

Answer:

dk

Step-by-step explanation:

Answer:

It is probably 6 inches wide. I tried my best

Step-by-step explanation:

Answer:

1st is 15 dollar I am looking for 2nd 1by2 dollar 3rd no