The acidity in a swimming pool is considered
normal if the average of three pH readings, p, is
defined such that 7.0

readings are 7.2 and 7.6, which value for the third
reading will result in an overall rating of normal?
1) 6.2
2) 7.3
3) 8.6
4) 8.8

Answers

Answer 1

Answer:

6.2

Step-by-step explanation:

[tex] \frac{7.2 + 7.6 + x}{3} = 7.0 \\ \frac{14.8 + x}{3} = 7.0 \\ 14.8 + x = 21 \\ x = 21 - 14.8 \\ x = 6.2[/tex]


Related Questions

Answer PLEASEE (brainlist)

Answers

Answer:

what you just answered

Step-by-step explanation:

2(5) + 3 = 13 so (5,1) is not

Answer:

D is the correct answer.

Step-by-step explanation:

1 times 2 is 2 plus 3 is 5, so its not A

2 times 2 is 4 plus 3 is 7 so its not B

and 3 times 2 is 6 plus 3 is 9 so it cant be C either

Therefore its D.

What are the answers to these?

Answers

A=10
B=-12
C=3.6



I need to make the answer 20 letters so here’s a cookie

Can u solve this please? Pythagorean theorem

Answers

Answer:

12.8 ft or exactly sqrt 164

Step-by-step explanation:

Pythagoreans is a^2+b^2=c^2

10^2+8^2=164

sqrt 164 = 12.8 ft

You need to know how far you are away from the lighthouse.
You use a range finder to find the distance from the sailboat to the lighthouse light is 245 yards.
For angle B, chose an angle measure between 25° and 45°: __________
Based on the above information, find the distance from the sailboat to the island where the lighthouse is located.

Answers

Answer:

The distance from the sailboat to the island where the lighthouse is located is approximately 212.2 yards

Step-by-step explanation:

The distance between the sailboat and the lighthouse is found using trigonometric ratios as follows;

The given parameters are;

The distance from the sailboat to the lighthouse's light = 245 yards

The angle of elevation of angle B = An angle chosen between 25° and 45°

For simplicity, we chose, B = 30°

A right triangle formed with the height of the light house and the horizontal distance of the sailboat from the lighthouse as legs and angle B is the angle adjacent to the horizontal distance of sailboat from the light house

The hypotenuse length = The distance from the sailboat to the lighthouse's light = 245 yards

By trigonometric ratio, in the we have;

[tex]cos\angle B = \dfrac{Adjacent\ leg \ length}{Hypotenuse \ length}[/tex]

The adjacent leg length = The horizontal distance of sailboat from the light house

[tex]\therefore cos (30^{\circ}) = \dfrac{The \ horizontal \ distance \ between \ the \ sailboat \ and \ the \ lighthouse }{245 \ yards}[/tex]

The horizontal distance between the sailboat and the light house = 245 × cos(30°) ≈ 212.176223927

Therefore;

The horizontal distance between the sailboat and the lighthouse ≈ 212.2 yards

Therefore, the distance from the sailboat to the island where the lighthouse is located ≈ 212.2 yards.

Mrs. James has $40.50 to spend at the store. She wants to buy a dress that costs thirty dollars and necklaces that cost $3.50. How many necklaces can she buy?​

Answers

Answer:

3 necklaces

Step-by-step explanation:

$40.50-$30.00=$10.50   Subtract her total money and cost of dress

$10.50-$3.50=$6.00  subtract each necklace price from remaining money

$6.00-$3.50=$3.50 keep subtracting price of necklace

$3.50-$3.50=$0  that was 3 necklaces

Determine the value of y for y=x-6

Answers

Answer:

(From left to right)

y = -13; -12; -3; -1; and 1

Step-by-step explanation:

HELP QUICK PLS :’( What is the equation of the line that goes through (2, 2) and is perpendicular
to y = 5x + 3?

Answers

Answer:

b

Step-by-step explanation:

B............


explanation:

Find the sum of the digits in the product of: 1001x1001x1001

Answers

Answer:

1003003001

Step-by-step explanation:

1001x1001x1001=1003003001

Answer:

1,003,003,001

Step-by-step explanation:

[tex]1001^3=1,003,003,001[/tex]

Figure A to figure B?

Is that right?

Answers

Answer:

d

Step-by-step explanation: cause thats the only answer that will maked sense

A factory store has two types of machines.
The factory has 6 cutting machines and 4 stamping machines.
Each cutting machine cuts 105 parts every 3 minutes.
Each stamping machine stamps 24 parts every 20 seconds.

One of the cutting machine is shut down for repairs How many parts can the remaining machines cut in
412 hours?
788 parts
2,363 parts
28,350 parts
47,250 parts

Answers

Answer:

c or d maybe d

Step-by-step explanation:

On wednesday 72% of the customers who bought gas at a gas station mad additional purchases. There were 250 customers who bought gas. how many of these 250 customers made additional purchases?

Answers

Answer:
180

Explanation:
72% of 250 equals
0.72 x 250

Hope this helps!

A conical termite mound has a height of 1.4m and a base of radius 60cm if there are three termites per cubic centimeter, how many termites inhabit the mound?

Answers

Answer:

1583362.7 termites

Step-by-step explanation:

A conical termite mound has a height of 1.4m and a base of radius 60cm if there are three termites per cubic centimeter, how many termites inhabit the mound

The formula for the volume of a cone

= πr²h/3

Radius = r = 60cm

Height = h = 1.4 m

Converting to centimeters.=

1m = 100cm

1.4m = x

x = 1.4 × 100cm = 140 cm

Volume of the cone = π × 60² × 140/3

527787.5658 cm³

From the above question

1cm³ = 3 termites

527787.5658 cm³ = x

Cross Multiply

x = 3 × 527787.5658

x = 1583362.6974 termites

Approximately.= 1583362.7 termites

Answer:A conical termite mound has a height of 1.4m and a base of radius 60cm if there are three termites per cubic centimeter, how many termites inhabit the mound

Step-by-step explanation:

A cylindrical cup and a cone both have a radius of 5 cm and a height of 8 cm. What is the approximate difference between the volume of the cup and the volume of the cone? A 133 cm B. 267 cm C. 419 cm D. 628 cm​

Answers

Answer:

419

Step-by-step explanation:

(7) hi I'm new can I get some help I really don't know what to do!

Answers

Answer:

60

Step-by-step explanation:

ez

Answer:

60

Step-by-step explanation:

to find the area of a trapezoid you do (a+b)/2 x h

so to find the area of yours you do (18+6)/2 x h

18 + 6 = 24

24 divided by 2 = 12

12 x 5 = 60

Maggie is buying party favors for her birthday party. She has $5.00 to spend. She can buy pencils for $0.50 each, rubber balls for $1.00 each, and yo-yos for $1.50 each. How many different combinations of these party favors can she buy with $5.00?

25pt

Answers

Maggie can buy 10 pencils, 5 rubber balls, and 3 yo-yos.

You just divide 5.00 but the price of each item to see how much you can buy without spending too much.

Ted was asked by his Dad to order for new pots for plants. The pots cost $2 each but is on sale at 25% off. If Dad would want him to buy 8 pots, how much will they pay for the entire purchase?

Answers

I think it’s $12 Bc 2x8=16-25% is 12

A little girl throws her jackstone ball horizontally out of the window with a velocity of 30 m/s. if the window is 3 m above the level ground, how far will the ball travel before it hits the ground?​

Answers

Distance (d) is 23.46 meters
Workup in the photo below.
Good luck.

PLEASE ANSWER BOTH AS FAST AS POSSIBLE PLEASE HELP HELP ILL MARK BRAINLEST!!!!! PLEASE ANSWER BOTH AS FAST AS POSSIBLE PLEASE HELP HELP ILL MARK BRAINLEST!!!!! PLEASE ANSWER BOTH AS FAST AS POSSIBLE PLEASE HELP HELP ILL MARK BRAINLEST!!!!! PLEASE ANSWER BOTH AS FAST AS POSSIBLE PLEASE HELP HELP ILL MARK BRAINLEST!!!!! PLEASE ANSWER BOTH AS FAST AS POSSIBLE PLEASE HELP HELP ILL MARK BRAINLEST!!!!! PLEASE ANSWER BOTH AS FAST AS POSSIBLE PLEASE HELP HELP ILL MARK BRAINLEST!!!!! PLEASE ANSWER BOTH AS FAST AS POSSIBLE PLEASE HELP HELP ILL MARK BRAINLEST!!!!! PLEASE ANSWER BOTH AS FAST AS POSSIBLE PLEASE HELP HELP ILL MARK BRAINLEST!!!!! PLEASE ANSWER BOTH AS FAST AS POSSIBLE PLEASE HELP HELP ILL MARK BRAINLEST!!!!! PLEASE ANSWER BOTH AS FAST AS POSSIBLE PLEASE HELP HELP ILL MARK BRAINLEST!!!!!

Answers

I’ll answer right now let me get a paper real quick

Answer:

0-0

Step-by-step explanation:

oof- hard stuff

54) The two-way table below shows the number of hours students studied and whether they studied
Independently or with a study group. What is the relative frequency of students that studied
Independently for more than 2 hours to the total number of students that studied independently?

Answers

Answer:

6

Step-by-step explanation: not 6

Gloria says the two expressions -2(3x-3) and -6x+1 are equivalent. Is She correct? Explain how you know.

Answers

Answer:

No she is not correct .

Step-by-step explanation:

Given

-2(3x-3)=-6x+1

simplify the right hand side

-6x+6 that is not equal to -6x+1

What is the value of z? Plz help

Answers

Answer: 24

Step-by-step explanation: 58 = 2z - 10

58 - 10 = 48 = 2z

z = 24

Jordana is putting a fence around a garden that is shaped like a half circle and a rectangle.

A rectangle with length 28 feet and width 14 feet. A semicircle with diameter 14 feet is on top of the rectangle.

How much fencing will Jordana need? Use StartFraction 22 over 7 EndFraction for Pi.
64 ft
86 ft
92 ft
114 ft
Mark this and return

Answers

Answer:

92

Step-by-step explanation:

Please help I'll mark brainliest

Answers

Answer:

okay...... where is the question

where is the question?

A right triangle has an angle measure of 52.4 degrees. What is the value of 'x', the missing angle?

Answers

In every triangle the sum of the three angles = 180°

If you have a right angled triangle it means one angle is 90°

So 90°+52.4°+ x = 180°

x=180-52.4-90
x=37.6°


What is the slope of the line?

Answers

Answer:

-3

Step-by-step explanation:

First, you look at which way it is going. From left to right, the line is going down, so the slope is negative. Change in y is 3 and change in x is 1. From any two points on the line, the y value changes by 3 every time the x value changes by 1.

Answer:

-3

Step-by-step explanation:

slope = rise/run

rise = vertical distance

run = horizontal distance

Step 1. Find two easy to read points on the line. Use points on intersections of grid lines.

For example, choose points (0, -3) and (-1, 0).

Step 2. Start at one point, say (0, -3). We must go to the other point using only vertical and horizontal moves. Go up 3 units. That is a rise of +3. It's positive 3 since up is positive. Now go left 1 unit. That is a run of -1. It is negative because going left is negative.

Step 3.

slope = rise/run

slope = 3/(-1) = -3

Answer: slope = -3

( x-4)(x-6) = how do you solve this problem

Answers

First you expand the expression
Then expression is equals to 0
And you can solve for X

Triangle ABC is similar to triangle WYZ.

Determine whether the following statement is true or false.

sin(B)>sin(Y)
true
false

Answers

True, because they are congruent.

The solution is, the following statement is, False.

What is triangle?

A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry. A triangle with vertices A, B, and C is denoted \triangle ABC. In Euclidean geometry, any three points, when non-collinear, determine a unique triangle and simultaneously, a unique plane.

here, we have,

given that,

Triangle ABC is similar to triangle WYZ.

now, we get,

Corresponding angles in similar triangles are congruent.

The similarity statement tells you angle B corresponds to angle Y,

so those angles are congruent.

The sines of congruent angles are identical.

so, we have,

 sin(B) > sin(Y) . . . . FALSE

 sin(B) = sin(Y) . . . . true

Hence, The solution is, the following statement is, False.

To learn more on triangle click:

brainly.com/question/29126067

#SPJ3

Tell if the Ratio is Part-to-part or part-to-whole

4 apples to 3 oranges

Answers

Answer: Part-to-part

Step-by-step explanation:

This is a part-to-part, because they show part of apples, and part of oranges. This ratio when set up is 4:3. If the ratio was part-to-whole, then the apples would be compared to the total amount of oranges and apples. The ratio for part-to-whole would be 4:7.

Hope this helps!

60 POINTS! (Reported if incomplete/absent)
Three neighbors plan to complete fencing projects this spring. As shown in the diagrams below, Neighbor A plans to fence in his rectangular backyard with a 6-foot tall wooden privacy fence. Neighbor B plans to construct a circular chain link fence around his pool. And, Neighbor C is putting a vinyl fence around three side of his front yard. Note: Diagrams are not drawn to scale. Intended fences are marked with a dashed line.

Answers

Answer:

- The neighbor that has the most amount of fence to put up is: Neighbor A.

- The neighbor that has the least amount of fence to put up is: Neighbor C.

Step-by-step explanation:

To calculate the amount of fence that Neighbor A has to put up, you need to add the following distances:

Convert yards to feet (Remember that :

To calculate the amount of fence that Neighbor B has to put up, you need to use the formula for calculate the circumference of a circle:

Where r is the radius.

In this case, the radius is:

Substituting, you get:

To calculate the amount of fence that Neighbor C has to put up, you need to add the following distances:

Therefore, the neighbor that has the most amount of fence to put up is: Neighbor A.

The neighbor that has the least amount of fence to put up is: Neighbor C.

hope this helps btw i just copy and pasted this so its not my work

Answer:

- The neighbor that has the most amount of fence to put up is: Neighbor A.

- The neighbor that has the least amount of fence to put up is: Neighbor C.

Step-by-step explanation:

Please help! 50 points,, I REALLY need someone to answer these correctly so dont just answer for points pleasseee,,.
Instructions
Search your home for a rectangular prism. Some examples are a cereal box, a CD case, or a coffee table. Measure your prism using appropriate units, such as inches, centimeters, or feet. (you can aslo make something up- as long as its an object that you can find in a house)

Complete ALL OF THESE. Show ALL work for calculations.

List the dimensions of your box. Be sure to include the units (in, cm, ft, etc.).
Describe the shape of the cross section when the box is cut parallel to the base.
What is the surface area of the box?
What is the surface area of the box if it is scaled up by a factor of 10?
What is the volume of the box?
What is the volume of the box if it is scaled down by a factor of 1/10

Answers

Answer:

I chose a box of cereal-------> rectangular prism

see the attached figure

Part 1)List the dimensions of your box. Be sure to include the units (in, cm, ft, etc.).

Length: 20 cm

Width: 8 cm

Height: 32 cm

Part 2).

Describe the shape of the cross-section when the box is cut parallel to the base

the shape of the cross-section would be a rectangle of dimensions

20 cm x 8 cm

Part 3)

What is the surface area of the box?

surface area=2*area of the base+perimeter of the base*height

area of the base=20*8=160 cm²

perimeter of the base=2*[20+8]-----> 56 cm

height=32 cm

surface area=2*160+56*32------> 2,112 cm²

the answer part 3) is

2,112 cm²

Part 4)

What is the surface area of the box if it is scaled up by a factor of 10?

we know that

surface area of the larger box=[scale factor]²*surface area original box

scale factor=10

surface area original box=2,112 cm²

so

surface area of the larger box=10²*2,112-----> 211,200 cm²

the answer part 4) is

211,200 cm²

Part 5)

What is the volume of the box?

volume of the box=L*W*H-----> 20*8*32------> 5,120 cm³

the answer Part 5) is

5,120 cm³

Part 6)

What is the volume of the box if it is scaled down by a factor of 1/10

we know that

volume of the smaller box=[scale factor]³*volume original box

scale factor=1/10

volume original box=5,120 cm³

so

volume of the smaller box=[1/10]³*5,120-----> 5.12 cm³

the answer part 6) is

5.12 cm³

Step-by-step explanation:

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