Can somebody please help me out please my grads are bad

Answer:

The 99% confidence interval for the mean distance from home to work for all residents of this state is between 8.49 and 9.19 miles.

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 - 0.99}{2} = 0.005[/tex]

Now, we have to find z in the Z-table as such z has a p-value of [tex]1 - \alpha[/tex].

That is z with a pvalue of [tex]1 - 0.005 = 0.995[/tex], so Z = 2.575.

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.

[tex]M = 2.575\frac{2.7}{\sqrt{400}} = 0.35[/tex]

The lower end of the interval is the sample mean subtracted by M. So it is 8.84 - 0.35 = 8.49 miles.

The upper end of the interval is the sample mean added to M. So it is 8.84 + 0.35 = 9.19 miles.

The 99% confidence interval for the mean distance from home to work for all residents of this state is between 8.49 and 9.19 miles.

Answer:

The family of all prime numbers such that [tex]a^{2} + b^{2} + c^{2} -1[/tex] is a perfect square is represented by the following solution:

[tex]a[/tex] is an arbitrary prime number. (1)

[tex]b = \sqrt{1 + 2\cdot a \cdot c}[/tex] (2)

[tex]c[/tex] is another arbitrary prime number. (3)

Step-by-step explanation:

From Algebra we know that a second order polynomial is a perfect square if and only if [tex](x+y)^{2} = x^{2} + 2\cdot x\cdot y + y^{2}[/tex]. From statement, we must fulfill the following identity:

[tex]a^{2} + b^{2} + c^{2} - 1 = x^{2} + 2\cdot x\cdot y + y^{2}[/tex]

By Associative and Commutative properties, we can reorganize the expression as follows:

[tex]a^{2} + (b^{2}-1) + c^{2} = x^{2} + 2\cdot x \cdot y + y^{2}[/tex] (1)

Then, we have the following system of equations:

[tex]x = a[/tex] (2)

[tex](b^{2}-1) = 2\cdot x\cdot y[/tex] (3)

[tex]y = c[/tex] (4)

By (2) and (4) in (3), we have the following expression:

[tex](b^{2} - 1) = 2\cdot a \cdot c[/tex]

[tex]b^{2} = 1 + 2\cdot a \cdot c[/tex]

[tex]b = \sqrt{1 + 2\cdot a\cdot c}[/tex]

From Number Theory, we remember that a number is prime if and only if is divisible both by 1 and by itself. Then, [tex]a, b, c > 1[/tex]. If [tex]a[/tex], [tex]b[/tex] and [tex]c[/tex] are prime numbers, then  [tex]2\cdot a\cdot c[/tex] must be an even composite number, which means that [tex]a[/tex] and [tex]c[/tex] can be either both odd numbers or a even number and a odd number. In the family of prime numbers, the only even number is 2.

In addition, [tex]b[/tex] must be a natural number, which means that:

[tex]1 + 2\cdot a\cdot c \ge 4[/tex]

[tex]2\cdot a \cdot c \ge 3[/tex]

[tex]a\cdot c \ge \frac{3}{2}[/tex]

But the lowest possible product made by two prime numbers is [tex]2^{2} = 4[/tex]. Hence, [tex]a\cdot c \ge 4[/tex].

The family of all prime numbers such that [tex]a^{2} + b^{2} + c^{2} -1[/tex] is a perfect square is represented by the following solution:

[tex]a[/tex] is an arbitrary prime number. (1)

[tex]b = \sqrt{1 + 2\cdot a \cdot c}[/tex] (2)

[tex]c[/tex] is another arbitrary prime number. (3)

Example: [tex]a = 2[/tex], [tex]c = 2[/tex]

[tex]b = \sqrt{1 + 2\cdot (2)\cdot (2)}[/tex]

[tex]b = 3[/tex]

Answer:

8

Step-by-step explanation:

Answer:

The total amount of fluids infused per day is 3,120 ml.

Step-by-step explanation:

Given that a patient is receiving a normal saline solution, infusing continuously at 80 ml / hr, and a tube feeding formula, Glucerna, infusing continuously at 50 ml / hr, to determine what is the total amount of fluids infused per day the following calculation must be done:

(80 x 24) + (50 x 24) = X

1,920 + 1,200 = X

3.120 = X

Therefore, the total amount of fluids infused per day is 3,120 ml.

230FT

Regular tetrahedron

Solve for volume

V≈1.15×107

Use the formula for the volume of a triangular pyramid: V=13Ah , where A = area of the triangular base, and H = height of the pyramid.

Answer:

11:32:00 AM

Step-by-step explanation:

Answer:

IO

Step-by-step explanation:

9514 1404 393

Answer:

  y-intercept

Step-by-step explanation:

If the function is graphed as ...

  y = f(x)

then y = f(0) is the y-intercept.

_____

Additional comment

Depending on the way the graph is created and labeled, any points or curve on the graph may cross the vertical axis at a point other than one that corresponds to an input of 0. In any event, it may not be called "y". It may be "sales" or "board feet" or "monkeys per acre". Then the name of the point may not be "y-intercept", but may be something else.

Answer:

c = 7.4

Step-by-step explanation:

Pythagoras Theorem

8². - 3 ². = c ².

√64 -√9 = c².

√55 = c². = 7.4161984871².

c = 7.4

Answer:

D. x²

Step-by-step explanation:

I calculated it logically

Answer:

0

Step-by-step explanation:

If two events are disjoing (aka mutually exclusive) that means that there is 0 overlap or the intersection equals 0

So the probability of A and B occuring is 0 (because P(A∩B)= 0)

Answer:

5.235

Step-by-step explanation:

Just use a calculator

Else

5.250

-0.015

______

5.235

Add 0 to make it equal. Carry 1 from 5 of 5.2'5'0 to 0 and make it 10. 10g5 is 5. Then 4 remains .4-1 is 3. Others are normally subtracted.

Answer: 0.06<0.61<0.7

Step-by-step explanation:

The numbers is 0.6< 0.61 <0.7.

It is required to find among the statements is true.

An integer is a whole number (not a fractional number) that can be positive, negative, or zero.

Given that:

0.7 is largest number among the given integer.

0.61 is 2nd largest number among the given integer.

0.6 is lowest number among the given integer.

∴0.6< 0.61 <0.7.

So, the numbers is 0.6< 0.61 <0.7.

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•ω• Hewo fren!

☆☆●◉✿Answer:✿◉●☆☆

The letters of hippopotamus is H-I-P-P-O-P-O-T-A-M-U-S

☆☆●◉✿Step-by-step explanation:✿◉●☆☆

I’m sowy, I didn’t really understand your question... did you want to learn about a hippopotamus? If so, please tell me in the comments I would answer there too!

HOPE I HELPED!  ∧∧

→⇒brainliest please? ∑(OΔO )♥♥︎

Answer:

Step-by-step explanation:

THE ANSWER IS : C

=

2

π

r

=

2

π

71

≈

446.10616

angle D = 92°

Step-by-step explanation:

Since the two figures are congruent.

angle D = angle K

20x + 12 = 25x - 8

5x = 20

x = 4

Substituting this value into angle D, we see that

angle D = 20x + 12

= 20(4) + 12

= 92°

Answer:

.; i don't know the constant but i know that the  degree is 3 Step-by-step explanation:

Answer:

Indirect method actually follows the same set of procedure as the direct method except that it begins with net income unlike the elimination method reduced a given system that indicates a system has no unique solution.

Answer:

102.2

Step-by-step explanation:

Answer:

[tex]\frac{x^6-yx-y^5}{x}[/tex]

Step-by-step explanation:

x^5-y^5 divided x-y

[tex]\frac{(x^5-y)x}{x} -\frac{y^5}{x}[/tex]

[tex]\frac{(x^5-y)x-y^5}{x}[/tex]

=> [tex]\frac{x^6-yx-y^5}{x}[/tex]

Step-by-step explanation:

a) A=π302=900π CM2 =2,827 CM 2

b) V=Ah=900=72000 π cm 3 = 226,195 cm3

Answer:

x=2, y=5. (2, 5).

Step-by-step explanation:

x+6y=32

-x-3y=-17

---------------

3y=15

y=15/3

y=5

x+6(5)=32

x+30=32

x=32-30

x=2

Answer:

-86

Step-by-step explanation:

3x10=30

22-3=19-3=16-3=13

so if its tthe 37th term, lets do 30x3=90

now 13-90=-77

-77=34th term

now just -3 until 37

-80

-83

-86

the 37th term is -86

Answer:

1.6m is the answer

Step-by-step explanation:

Answer: so you can give branliest to the other guy

Step-by-step explanation:

Answer:

The answer is B.

Step-by-step explanation:

The formula is Area = L x H

And remember perimiter is adding the legnth of all sides.

For A:

12 × 3 = 36

12 + 12 + 3 + 3 = 30

For B:

4 × 8 = 32

4 + 4 + 8 + 8 = 24

For C:

6 × 6 = 36

6 + 6 + 6 + 6 = 24

Hence, the answer is B, since B is the only one which meets the criteria.

Answer:

c

Step-by-step explanation:

I cannot see the whole picture. some numbers are cut off.

but just by making the calculating for the top-left corner we can see the only possible right answer.

so, top-left corner of A = 4 and of B = 7.

therefore, the top-left corner of the result matrix is then according to -2×A + 7×B

-2×4 + 7×7 = -8 + 49 = 41

the only solution option with 41 in the top-left corner is c.

Answer:

the expression is not factorable with rational numbers.

Answer:

The closest thing i can get to here is

38a^4-21- 7b^2

Step-by-step explanation:

thats the smallest i could get it to hope it helps <3

The area that Gretchen will be refinishing is 42 square feet.

A polygon is a closed more than two-sided and can be made up of a finite number of straight line segments and is a type of planar figure in geometry.

Each line of the polygonal circuit's segments is referred to as its edges or sides.

An octagon has 8 sides.

We know, Apothm is the distance from the center to its side.

We also know that an octagon can be divided into 8 similar triangles.

Therefore, The area of the octagon will be,

= 8×(1/2)×3×3.5 square feet.

= 4×10.5 square feet.

= 42 square feet.

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