Mathematics High School

how could two samples change a conclusion about lead levels in a river?

Answers

Answer 1

One sample could had been taken correctly and another could had took the approach by "wait-and-see"

Related Questions

A rectangle has a perimeter of 72 millimeters and a width of 8 millimeters. What is the length of this rectangle?

Answers

Answer:

Step-by-step explanation:

Since the perimeter is the width + width + length + length, we know that there 2 of the 8 millimeter width in the perimeter. So multiply 8 by 2, which is 16. So 16 of the 72 represents both widths. So subtract 16 from 72. You're left with 56, which represents 2 of the length. So divide 56 by 2, and you get one of the length, which is 28.

Answer:

28 ^^

Step-by-step explanation:

Good Luck!!!

Wow! Burt is amazing! He typed up eight reports in three hours. At this rate, how long will it take him to type the 40 reports waiting on his desk? Show your work, justifying your answer

Please help me fasstly

Answers

Answer:

15 hours

Step-by-step explanation:

since 8 reports took him 3 hrs

8+8+8+8+8=60

3+3+3+3+3=15

Which shows the expression (4a ^ 5 * b) ^ 3 simplified?

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(4a^5*b)^3 is simplified to
= 64a^15b^3

Which angles are coterminal with 7pi/8?

Select each correct answer

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Answer:

Step-by-step explanation:

-9pi/8

23pi/8

-25pi/8

I think its.

The coterminal angles of ( 7π/8 ) are ( 9π/8 ) , ( -9π/8 ) and ( 23π/8 )

What are coterminal angles?

Angles with the same starting side and terminal side are said to be coterminal angles. Depending on whether the given angle is in degrees or radians, finding coterminal angles is as easy as adding or subtracting 360° or 2 to each angle. Coterminal angles can be found in an unlimited number of ways.

To find the coterminal angles of angle θ

The measure of coterminal angle is θ ± 360n, if θ is measured in degrees.

And , measure of coterminal angle isθ ± 2πn, if θ is measured in radians.

Given data ,

Let the angle be represented as θ

Now , the value of θ = ( 7π/8 )

On simplifying the equation , we get

To find the coterminal angles of angle θ

θ ± 2πn, if θ is measured in radians.

Substituting the values in the equation , we get

x₁ = ( 7π/8 ) + 2π

x₁ = ( 23π/8 )

And ,

x₂ = 2π - ( 7π/8 )

x₂ = ( 9π/8 )

And ,

x₃ = ( 7π/8 ) - 2π

x₃ = ( -9π/8 )

Hence , the coterminal angles are ( 9π/8 ) , ( -9π/8 ) and ( 23π/8 )

To learn more about coterminal angles click :

https://brainly.com/question/29595158

#SPJ2

I need help I don’t understand it

Answers

shidddd lil buddy, try the 3rd one

I REALLY NEED HELP WITH THIS QUESTION WITH STEPS

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- y^6/5x^3z^2, Answer & Steps below:

PLEASE HELP ME WITH THIS!!!

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Answer:

I think h is 20 I am not sure

If f(x) = x^3 - 1 then f^-1 (26) = ?

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Answer:

−8f+4

−

x=−

−8f+4

−

+1, (f



=0 and f≤4−2

) or f≥2

Step-by-step explanation:

Brainily spaces it weird I hope this helps

The inverse function is f⁻¹(x) = ∛(x + 1). And the value of the function at x = 26 will be 3.

What is the inverse function?

Let the function f is given as

y = m(x + a) + c

Then the inverse function of the function f will be given by swapping x with y and y with x.

The function is given as,

f(x) = x³ - 1

The inverse function of the function f(x) will be given as,

x = [f⁻¹(x)]³ - 1

[f⁻¹(x)]³ = x + 1

f⁻¹(x) = ∛(x + 1)

The value of the inverse function at x = 26 will be given as,

f⁻¹(26) = ∛(26 + 1)

f⁻¹(26) = ∛(27)

f⁻¹(26) = ∛(3³)

Answer:

x=7, y=9. (7, 9).

Step-by-step explanation:

-3x+y=-12

5x-2y=17

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

y=-12-(-3x)

y=-12+3x

y=3x-12

5x-2(3x-12)=17

5x-6x+24=17

-x+24=17

-x=17-24

-x=-7

x=7

y=3(7)-12

y=21-12

y=9

If AABC ~ ADEF, which pair of angles are always congruent?

Answers

Answer:

2nd answer choice

Step-by-step explanation:

they are congruent aka equal or in the same spot

Please help me on this problem

Answer:

127.1 m

Step-by-step explanation:

We are given the value of the adjacent side and we are to find the value of the opposite side

Tan would be used to determine this value

Tan 23 = opposite / adjacent

1.5882 = x / 80

x = 80 x 1.5882

x = 127.056 m

x = 127.1m

the tenth is the first number after the decimal place. To convert to the nearest tenth, look at the number after the tenth (the hundredth). If the number is greater or equal to 5, add 1 to the tenth figure. If this is not the case, add zero

Please find attached a diagram showing the angle of elevation

Help needed asap will give brainliest

Answers

Answer:

C is the correct :)

Step-by-step explanation:

Answer:

3rd sentence

Step-by-step explanation:

The answer is A because the reverse of 6.75 is negative 6.75.

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Answer:

The is A as you say lol i don't know

This is the question I need help with :) THANK YOU!! <33

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Answer:1000

Step-by-step explanation:

Solve this equation: –2(x + 16) = –20 *

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Answer:

[tex]{\huge\purple{\fbox{{࿐αɴѕωєя࿐}}}}[/tex]

[tex] - 2(x + 16) = - 20 \\ - 2x + 16 \times - 2 = - 20 \\ - 2x - 32 = - 20 \\ - 2x = - 20 + 32 \\ - 2x = 12 \\ x = \frac{12}{ - 2} \\ x = \frac{ - 12}{2} \\ x = - 6[/tex]

ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ

[tex] \huge\blue{ \mid{ \underline{ \overline{ \tt ꧁❣ ʀᴀɪɴʙᴏᴡˢᵃˡᵗ2²2² ࿐ }} \mid}}[/tex]

Answer:

"solve this equation: - 2 (x+16)= - 20

Step-by-step explanation:

- 2x 16 + - 2 = - 20

- 2x - 32 = - 20

- 2x = - 20 + 32

x = - 12 :2

x = - 6

Simplify 25√13 / 17√13

Answers

Answer:

25/17

Step-by-step explanation:

the sqrt 13 on the top and bottom would cancel out and leave you with 25/17

Here’s your answer! Have a good day :)

Last year, Nicholas started babysitting to earn extra spending money. Over the summer, he

tracked how much money he earned at each babysitting job. This box plot shows the results.

Babysitting earnings ($)

What percent of the time did Nicholas earn $25 or less?

Answers

Answer:

25%

Step-by-step explanation:

From the boxplot Given, an earning of $25 or less is represented on the boxplot as the lower quartile of the distribution which is the point at the start of the box. The lower quartile value is the percentage value up to 25% that is the first 25% of the distribution.

Hence, the percentage required = 25%

Hence, Nicholas earned $25 or less about 25% of the time.

A company is expanding its building area from 13,500 square feet to 16,470 square feet. What is the percentage increase of the area of the building space?

Answers

Answer:

.22 or 22% increase

A^2 + B^2 = C^2

25^2 + 30^2 is NOT 30^2

This is a triangle, just not a right triangle.

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Blood type is determined by multiple alleles and can be used to determine the possible parents of an offspring. In this case, the mother has blood type B, and her child has blood type A. There are two possible fathers for this child. The phenotype of one man is type O, and the phenotype of the other man is type AB. What is the genotype of the man who is the father? A. IAIBB. IAioC. ioioD. IBio Briefly discuss Emilia Pardo Bazn's most notable accomplishments. Write your answer in English. GUYS CAN WE GET THE PERSON WHO ANSWERS THIS CORRECTLY 1,000 THANKS?1+1-1+1*1=A. 3B. 1C. 2D. -1 8th grade math please explain Can someone pleaseeee i know its 4 but to show what? How do we express 25 in exponential form? i will giv brainllents If log a=x and logb=y, then log ab is equivalent to I would really appreciate if any of you guys can help me on this please and thank you !! Use Pythagorean theorem to find right triarFind the value of x in the triangle shown below.82As10AD HELP PLEASE I WILL DO ANYTHING Jill has a rectangular table that is 3 1/2 feet long and 1 3/4 feet wide what is the area of jills table?please help! what is the advantages did the Locomotives have over carts pulled along by horses? 1. You have a 16m by 24m rectangular area in your garden. You want to use itto construct a swimming pool. The swimming pool will have a surroundingfoot path of 2m. If it costs $3 per square meters to tile the footpath, Howmuch will it cost to tile the entire footpath?2m2m16 m24 m The center of a circle is located at (2, -1). A point on the circle is located at (-3,-1). What is the approximate circumference of the circle?A16 unitsB31 unitsC79 unitsD100 units plus answer this ASAP which of these media elements is not used by the wall street journal but is used by other newspapers? explain the importance of fingerprint record in criminal investigation. can anyone write this poem for me? the topic can be about you, i dont mind and you only have to write one, ive already wrote oneWrite two memory poems.Requirements: Each poem must focus on a different type of event that elicits a different emotion. For example, one poem may be about a serious memory and the other about a happy memory; one must have an example of alliteration, the other must have an example of repetition (both could have both if you want). Examples of alliteration and repetition must be in bold.The early times and the early places of our lives are a rich source of material for many writers - sad things, funny things, frightening things, etc. Write two poems in which you bring to life an important incident from your past. Use a form that works best for your particular topic. Drag a number into each box to show how to find the quotient 432 = 24 using the model. Numbers may be used once, more than once, or not at all.11880192Tens +24432- 240192- 192432 + 24 =