The safe fluoride-to-water ratio is 0.5 to 1.4 parts per million (ppm) gallons. What is the range in parts of fluoride that could be added to 500,000 gallons of water?

Answers

Answer 1

Answer:

250,000 to 700,000 parts

Step-by-step explanation:

For the lower ratio of 0.5, we have to get 0.5 flouride parts/1 gallon of water equivalent to (some fluoride parts)/ (500,000 gallons of water). we can multiply 500,000 by 0.5 to get 250,000 as our lower limit. Similarly, we can multiply 500,000 by 1.4 to get 700,000 as our upper limit


Related Questions

Please help me with this question i am struggling

Answers

Answer:

x would be 7 units because 4 × 7 = 28 And 28 + 10 = 38

Step-by-step explanation:

An aircraft carrier left Port 35 traveling north five hours before a container ship. The container ship traveled in the opposite direction going 8 km/h faster than the aircraft carrier for seven hours after which time the ships were 303 km apart. What was the aircraft carrier's speed ?

Answers

Answer:

Aircraft carrier speed = 4.97 km/h

Step-by-step explanation:

Given that the time taken by the aircraft = 5 hours

Let the distance covered = X

Speed = V

Time taken by the ship = 7 hours

Let the distance covered = Y

Speed = 8V

Since it is 8 km/h faster than the aircraft carrier.

Using the speed formula

Speed = distance/time

Distance = speed × time

For the aircraft;

X = 5V

For the ship:

Y = 7 × 8V = 56V

Since they are 303km distance apart,

X + Y = 303

5V + 56V = 303

61V = 303

V = 303/61

V = 4.97 km/h

Aircraft carrier speed = 4.97 km/h

Evaluate 3|-3|
if you could do it step by step I’d appreciate

Answers

Answer:

9

Step-by-step explanation:

the absolute value of -3 is 3

so; 3*|-3| =3*3 =9

A single candy is picked
randomly from a bag
containing 5 red, 4 Green, and
3 blue. Give the probability of
picking a candy that is not blue.

Answers

Answer:

9/12 or 3/4 (it's the same)

Step-by-step explanation:

You have to guve the probabiloty of picking a candy that is not blue, so you have to do:

5 red + 4 green = 9

total = 5 + 4 + 3 = 12

9/12 is equal to 3/4

Step-by-step explanation: the  answer is3/12

it is 3/12 because if you add 5+4+3 you will get 12 so out of that 12 which are blue which is 3 so it would be three

if it is wrong sorry but if it right hope its was correct :)

Lines r and a are parrallel.if m<2=110,what is m<7?

Answers

Answer:

m< 7 = 70

Step-by-step explanation

m< 2 + m< 1 = 180

180 - 110 = 70

m< 1 = 70

because the lines are parallel m< 1 = m< 7

so m< 7 = 70

Which measurement would not be used to calculate the area of this triangle?
16 cm
12 cm
24 cm
1.
12 cm
2.
16 cm
3.
24 cm
pls someone help this is due in 10 minutes and i have a lot more to do​

Answers

Answer:

Im not sure but i think 2 is the answer

Step-by-step explanation:

Which is NOT true regarding the hypotenuse? *
O It is the longest side of the right triangle
It helps form the right angle.
It is across from the right angle

Answers

Answer:

It helps form the right angle.

Step-by-step explanation:

The hypotenuse is across from the right angle formed by the shorter sides.

Answer:

B: It helps form the right angle.

Step-by-step explanation:

what is the maximum volume of water a hamster bath could hold with a depth of 1 2/3 inches, a length of 2/13 inches and a width of 2 inches

Answers

Answer:

I'm glad you asked.

Step-by-step explanation:

The max volume would be 70/9 or 7 7/9.

John and David have a rectangular piece of property. The length is 8 more miles than the width, the perimeter is 60. What are the possible dimensions?​

Answers

Answer:

Length: 19

Width: 11

Step-by-step explanation:

19 miles is 8 miles longer than 11 miles.

With these dimensions, the perimeter is equal to 60 miles.

A classroom has 14 blue chairs, 5 green chairs and 11 red chairs. If a chair is selected from the classroom at random, which color is most likely to be choses?

Answers

Answer:

Blue, and with a 7/15 chance

Step-by-step explanation:

14+5+11=14+16=30

b=14/30=7/15

r=11/30

g=5/30=1/6

Please mark as Brainliest! :)

Have a nice day.

Mathematics question

Answers

So the answer of question no 4 is 2

The answer of question no 5 is 5

Look at the attached picture

Hope it will help you

Good luck on your assignment

Answer:

Step-by-step explanation:

number 4 :  x=2

number 5:  x=5

What type of correlation is shown in the graph?
A) Positive
B) negative
C) no correlation

Answers

Answer:

No correlation

Step-by-step explanation:

This is because they are all spread out and aren't all consistently going up or down.

Answer:

C

Step-by-step explanation:

Please help answer this asap!
Examine this system of equations. Which numbers can be multiplied by each equation so that when the two equations are added together, the y term is eliminated?

1/4x - 1/6y = 5
4/5x + 3/8y = 10

1. 18 times the first equation and 8 times the second equation
2. –18 times the first equation and 8 times the second equation
3. 8 times the first equation and 6 times the second equation
4. –8 times the first equation and 6 times the second equation

Answers

Answer:

try answer 3 its been a minute hun but im pretty sure its 3. im sorry if the answer is wrong.

Step-by-step explanation:

Which set includes all of the integers?
{1,2,3,4,5...)
{...-3.-2, -1.0, 1, 2, 3,...)
{0, 1, 2, 3, 4, 5,...)​

Answers

Answer:

its {0,1,2,3,4,5......}

Step-by-step explanation:

Answer:

whoops wrong question srry

Step-by-step explanation:

The volume of a cylinder is 576Pi cubic inches. The radius of the circular base is 4 inches. What is the height of the cylinder?

Recall the formula V = pi r squared h.
18 inches
24 inches
36 inches
72 inches

Answers

Answer:

The height of the cylinder is 36 inches

Step-by-step explanation:

Given, The volume of a cylinder is 576[tex]\pi[/tex] cubic inches and the radius is 4 inches.

[tex]\pi[/tex] = 3.14

Formula for voulme of cylinder is V = [tex]\pi[/tex] * r^2 * h

Substitute the given values in the above formula to find the unknown value.

V = 3.14 * 4^2 * h

576[tex]\pi[/tex] = 3.14 * 4^2 * h

1,808.64 = 3.14 * 16 * h

1,808.64 = 50.24 * h

1,808.64 / 50.24 = h

36 = h

h = 36 inches

The final answer is 36 inches.

Therefore the height of the cylinder is 36 inches.

To solve more questions or To get to know more about the cylinder problems:

https://brainly.com/question/16577039

Maria is four times as old as Frank. In two years Maria will be 3 times as old as Frank. Find their present ages?

Answers

Answer:

Maria is 16 and Frank is 4

Step-by-step explanation:

I need help finding the area of the polygons.

Answers

Answer:

hope it helps

Step-by-step explanation:

1. area = 15*15 - 5*6 = 195

2. area = (8+16)*8 /2   -     5*3  =  96 - 15 = 81

3. area = 12*3 + 9 * (12 - 4 - 4) = 36 + 9*4 = 36+36 = 72

4. x = 6-3 = 3

   y = 3- (-1) = 4

   z = 7-3 = 4

area = 2*x*y/2 + y*z = 2*3*4/2 +4*4 = 12+16 = 28

Solve the equation for x : x3=64

Answers

Answer:

x=21.3333

Step-by-step explanation:

its right

Answer:

X=4

Step-by-step explanation:

Hope I helped:)

1. If you deposit $9200 into an account paying 7% annual interest
compounded quarterly, how much money will be in the account after 10 years? a
A) $20,123.85
B) $ 8,549.75
C) $18,414.70
D) $10,487.20

Answers

Answer:

C) $18,414.70

Step-by-step explanation:

  [tex]A = 9,200 (1 +\frac{0.07}{4}) ^{4 x 10}[/tex]

      = $18, 414.70

percentage increase from 14 to 40

Answers

Answer:

185.714% increase

Step-by-step explanation:

To find the percentage increase, take the new amount and subtract the original amount

40-14 = 26

Divide by the original amount

26/14

1.857142857

Multiply by 100% to change to percent form

185.714%

Answer:

185.714%

Step-by-step explanation:

What is a like radical to cube root 54 after simplifying

Answers

Answer:

3√128

Step-by-step explanation:

Heyguys can soeom plzz help meee?? IDK how to do this!! 20 Points? plz write all details of the problem plzz!

Math problem: An airplane traveled 5.7 x 102 miles per hour for 1.4 x 101 hours. How far did the airplane travel?

Answers

Answer:

The distance travelled is 7.98×10³ miles.

Step-by-step explanation:

Given that the formula to find distance is Distance = Speed×Time. Then you have substitute the values into the formula :

[tex]distance = speed \times time[/tex]

Let speed = 5.7×10²,

Let time = 1.4×10¹,

[tex]d = (5.7 \times {10}^{2} ) \times (1.4 \times 10)[/tex]

[tex]d = (5.7 \times 1.4) \times ( {10}^{2} \times 10)[/tex]

[tex]d = 7.98 \times {10}^{3} miles[/tex]

Which operations could you use to solve this word problem? Check all that

apply

STEP 2: PLAN

The entire school, 250 students, went to the soap

box derby. The Math Club went in 2 vans, and

each van held 6 students. How many students

from the Math Club went to the soap box derby?

O

A. Multiplication

B. Subtraction

C. Division

D. Addition

Answers

Answer:

A and D

Step-by-step explanation:

if each van held 6 students and the math club went in two vans, then you can use multiplication to figure it out. each van held 6 students, the math club went in two vans, so the equation can be 6 x 2. BUT you can do addition as well. because 6 plus 6 will give you the same answer as 6 x 2 because each van holds six students, there were two vans so 6 plus 6 is another way to solve this problem.

Determine if a linear, exponential, or quadratic function is the best model for the data given in the table below.

Answers

Answer:

linear

Step-by-step explanation:

yes it is linear since I did this question and got it right

Jaylen rents bowling shoes for $6 and pays $5 per bowling game. Is the relationship a proportional relationship? Explain

Answers

Answer:

yes

Step-by-step explanation:

the easy explanation is that the graph is straight so it means its proportional. the more detailed one is that you don't care about those 6$, cause its only says to you where the graph starts from (if you'll see it isn't from 0 there its from 6). you do care about the 5$ detail. and they say its for every game which is the definition of proportional (for every *blank amount of x* youll need *blank amount of y* ) you can see that after 1 game youll pay 5$ and then 10$ and so on....

I will give you brainliest if you answer pleaseee

Answers

Answer: The area of the banner is 100 in^2

Step-by-step explanation:

so let say the banner was still a rectangle with the triangle still  attached to it so if we needed to find the area of the whole rectangle we will need to multiply the length times the width

so  14 * 8 =  112    

But now a triangle is being cut out of the rectangle so we need to find the area of the triangle being cut out and subtract it from the area of the whole rectangle.  But first we need to find the base and the base is 8  since the other side  base is 8  too and the height will be 3 since 14- 11= 3  

Now find the area of the triangle by multiplying the base times the height and divide it by 2.

8 * 3= 24

24/2= 12

subtract 12 from 112

112- 12 = 100

PLEASE ANSWER Question is in Attachment
Will mark brainliest

Answers

Answer: x=3

Step-by-step explanation: Please mark as brainliest

5x+34+8x+15=88

step by step

Let's solve your equation step-by-step.

5x+34+8x+15=88

Step 1: Simplify both sides of the equation.

5x+34+8x+15=88

(5x+8x)+(34+15)=88(Combine Like Terms)

13x+49=88

13x+49=88

Step 2: Subtract 49 from both sides.

13x+49−49=88−49

13x=39

Step 3: Divide both sides by 13.

13x

13

=

39

13

Robert wants to put lights around the edge of his deck.the deck is 46 feet long and 29feet wide .how many yards of lights does he needs.

Answers

Answer:

1334feet

Step-by-step explanation:

46x29

help please with easy geometry
Which type of line symmetry does the figure have?


vertical

horizontal

diagonal

none of the above

Answers

Answer:

Vertical line of symmetry

the vertical line of symmetry

√(25 - 10 √(3) + 3)
(not as a decimal)

Answers

Answer:

[tex]\huge\boxed{\sqrt{25-10\sqrt3+3}=5-\sqrt3}[/tex]

Step-by-step explanation:

[tex]\sqrt{25-10\sqrt3+3}=(*)\\\\25=5^2\\3=(\sqrt3)^2\\10\sqrt3=(2)(5)(\sqrt3)\\\\(*)=\sqrt{5^2-(2)(5)(\sqrt3)+(\sqrt3)^2}\\\\\text{use}\ (a-b)^2=a^2-2ab+b^2\\\\=\sqrt{(5-\sqrt3)^2}\\\\\text{use}\ \sqrt{a^2}=|a|\\\\=|5-\sqrt3|=5-\sqrt3\\\\^{\text{because}\ 5>\sqrt3\to5-\sqrt3>0}[/tex]

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Assume that only two firms (Nextflix and Flixbuster) sell in this market, that each firm offers the same quality of service and movie selection, and that each firm's marginal cost is constant and equal to 0 (zero) due to excess capacity.Price/Month (P) Number of Customers (Q) Total Revenue/Month (TR) $10 0 $0 $9 100 $900 $8 200 $1,600 $7 300 $2,100 $6 400 $2,400 $5 500 $2,500 $4 600 $2,400 $3 700 $2,100 $2 800 $1,600 $1 900 $900 $0 1,000 $0If the two firms operating in this market agreed to each supply one-half of the quantity a monopolist would supply, the contract would specify that: a) Nextflix supplies zero subscriptions and Flixbuster supplies 500 subscriptions. b) Nextflix supplies 250 subscriptions and Flixbuster supplies 250 subscriptions. c) Flixbuster supplies 400 subscriptions and Nextflix supplies 100 subscriptions. d) Nextflix supplies 400 subscriptions and Flixbuster supplies 100 subscriptions. e) Flixbuster supplies 500 subscriptions and Nextflix supplies zero subscriptions. 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( Paragraph 21)C With the third week of kindergarten Charles was an institution in our family; the baby was being a Charles when she cried all afternoon ( Paragraph 41)D We had a little trouble adjusting, the first week or so, she said primly, but now hes a fine little helper. With occasional lapses, of course. ( Paragraph 68) PLS ANSWER THIS AS SOON AS POSSIBLE I RlY NEED HELP WITH IT AND IDK WHICH IS THE RIGHT ANSWER PLS HELP. ps the lines on graph your able to change to find the answer. And the photos are the same thing its just i couldnt fit it in one photo Which of the following are two main ideas of the article? 1 The Northern and Southern states disagreed over whether or not people should have slaves. 2 The Confederacy was formed when Southern states decided not to be a part of the United States. 3 Abraham Lincoln was elected president in 1860 and allowed slavery to remain in Southern states. 4 The Northern states won the Civil War and millions of slaves were awarded their freedom.A 1 and 3 B 2 and 3 C 3 and 4 D 1 and 4 any body who answers i will give brainliest FAST PLEASE quadrilateral PQRS is rotates 90 clockwise about the origin to form quadrilateral PQRS. what is the y-coordinate of point P plz.solve this questionI will mark u as brainliest if u are right The graph shows the best-fit regression model for a set of data comparing the number of hours spent hiking and the number of miles traveled in one day.A) Each point in the data set falls on the regression line. 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