By "undoing" the common logarithm by exponentiating both sides with base 10 to obtain [H+] = 10pH. "Solution A" has a hydrogen ion concentration of [H+] = 105.6 0.0000025 = 2.51 106 M.
How can I determine H value?The number of articles for which an author has been cited at least that many times by other writers is used to compute the h-index. For instance, a scientist with an h-index of 17 has at least 17 papers to their credit, each of which has been mentioned at least 17 times.
At pH 7, [H+] = [OH-] = 1 x 10-7 M, the molarity of acidic H+ ions matches the molarity of basic OH- ions.
The pH of threeThe pH scale is logarithmic, which means that an increase or decrease in an integer number will result in a tenfold change in concentration. A pH of 3 is ten times more acidic than a pH of 4, for instance. Similar to how a pH of 3 is 100 times more acidic than a pH of 5, so is a pH of 5. A pH of 11 is also ten times more basic than a pH of 10, for example.
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Mary is four years older than Sue. If the sum of their ages is 16, how old are Mary and Sue?
Answer: Mary 10 Sue 6
Step-by-step explanation:
Answer:
Sue is 6 and Mary is 10
Step-by-step explanation:
let Sue's age be x then Mary is x + 4 and the sum of their ages is
x + x + 4 = 16
2x + 4 = 16 ( subtract 4 from both sides )
2x = 12 ( divide both sides by 2 )
x = 6
x + 4 = 6 + 4 = 10
then Mary is 10 and Sue is 6
-14a-(-48a) Please help me and show the work
Directions: Determine whether each equation represents a direct variation. If yes, identify the
constant of variation.
Y - 6 =2(x-3)
Answer:
Yes, this equation represents a direct variation equation
constant of variation = 2
=========================================================
Explanation:
Let's solve for y
y - 6 = 2(x-3)
y - 6 = 2x - 6
y - 6+6 = 2x - 6+6
y + 0 = 2x + 0
y = 2x
The equation is in the form y = kx which fits a direct variation equation. The constant of variation is k = 2.
7. The volume of a cylinder is represented by the formula V = r² h.
Find each missing height and show your reasoning.
volume (cubic inches) radius (inches) height (inches)
96. 4
31.25. 2.5
V. r
Based on the calculations, each missing height of this cylinder is; 6 and 5 inches.
How to calculate the volume of a cylinder?Mathematically, the volume of a cylinder can be calculated by using this formula:
V = πr²h
Where:
V is the volume of a cylinder. h is the height of a cylinder. r is the radius of a cylinder.
Now h the subject of formula, we have:
h = V/πr²
When V = 96π and r = 4, the volume of this cylinder is;
h = V/πr²
h = 96π/π(4)²
h = 96/16
Height, h = 6.
When V = 31.25π and r = 2.5, then the volume of this cylinder is;
h = V/πr²
h = 31.25π/π(2.5)²
h = 31.25/6.25
Height, h = 5.
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PLS HELP ASAP!!!!!!!
Triangle ABC is congruent to triangle XYZ. Side
BC corresponds to what side in triangle XYZ?
Name a pair of vertical angles.Vert
The pair of vertically opposite angles are ∠1 and ∠3 and ∠4 and ∠2.
What is vertically opposite angles?Vertical angles are a pair of non-adjacent angles formed by the intersection of two straight lines and are opposite to each other.
Vertically opposite angles share the same vertex point.
In other words, vertically opposite angles are angles that are opposite one another at a specific vertex and are created by two straight intersecting lines
Vertically opposite angles are congruent to each other.
Therefore, the pair of vertical angles are as follows:
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40 students and 24 staff members how many is on the same team with same number of students and staff
The number on same team with same number of students and staff is 8.
What is a factor?A factor of a number simply means a number that divides another number without having a reminder.
In this case, there are 40 students and 24 staff members. Therefore, to have same team, we have to find the highest common factor for the numbers.
The highest common factor for 24 and 40 will be:
24 = 2, 3, 4, 6, 8, 12 and 24
40 = 2, 4, 5, 8, 10, 20 and 40
The highest factor is 8 which is the correct answer regarding the question.
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The sum of three times x and 4 is 25. Find x.
Answer: X=7
Equation: 3x+4=25
Subtract 25-4=21
Divide 21 by 3, which equals 7
Therefore, x=7
A shelf storage center has many storage rooms that are 6 feet wide, 10 feet deep, and 12 feet high. What is the volume of the room?
We need to find the volume of a rectangular prism with dimensions 6 ft, 10 ft, and 12 ft:
• The volume of a rectangular prism is given by the product of its dimensions.
Thus, the volume V of the room is given by:
[tex]\begin{gathered} V=6ft\cdot10ft\cdot12ft \\ \\ V=6\cdot10\cdot12(ft\cdot ft\cdot ft) \\ \\ V=720ft^{3} \end{gathered}[/tex]Therefore, that volume is 720 cubic feet.
please answer it...... Question:
[tex]if 3 (X - 1) - 5 (x - 4) = 8 find the value of x -5 \times \frac{1}{2} [/tex]
Answer:
.........................
What is the domain of the function??
Answer:
Domain is permissible values of x.
Set notation: { x | -1 ≤ x < 6, x ∈ R}
Interval notation: [-2,6)
Hope that helps
imagine that a researcher is interested in whether residents in his local area have higher levels of well-being than the national average. what would be an appropriate alternate hypothesis for a one-tailed or directional z-test for this test? group of answer choices
The alternate hypothesis for the directional z-test is:
Local resident's average > National average
A hypothesis is a theory put up to explain a phenomenon. A hypothesis must be testable according to the scientific method for it to be considered a scientific hypothesis. Scientific hypotheses are typically based on prior observations that cannot be adequately explained by the current body of knowledge.
One of the ideas put out in the hypothesis test is the alternate hypothesis.
A researcher wants to know if people in his neighborhood have a better well-being than people nationwide.
The appropriate hypothesis for a one-tailed or directional z test for the test will be that the average local residents are higher than the national average.
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Write y=-2x in standard form. Then graph the function.
The equation y = -2x in the standard form is 2x + y = 0 and the graph of the function is shown below .
In the question ,
it is given that
the equation is y = -2x
The equation in standard form is represented as ax + by = c
to write the equation y = -2x in the standard form
taking all the terms to LHS , we get
2x + y = 0
hence y = -2x in standard form is 2x + y = 0 .
the graph is shown below .
Therefore , The equation y = -2x in the standard form is 2x + y = 0 and the graph of the function is shown below .
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Select the correct answer. Which statement correctly compares functions f and g? function f function g An exponential function passes through (minus 1, 5), and (2, minus 1.5) intercepts axis at (1, 0), and (0, 2) Function g is a decreasing exponential function with a y-intercept of 5 and no x-intercept. A. They have different end behavior as x approaches -∞ and different end behavior as x approaches ∞. B. They have the same end behavior as x approaches -∞ and the same end behavior as x approaches ∞. C. They have the same end behavior as x approaches -∞ but different end behavior as x approaches ∞. D. They have different end behavior as x approaches -∞ but the same end behavior as x approaches ∞.
Ans just ad it to your profile
Step-by-step explanation:
………………………………………………..
Answer:
A coma is placed where there is a pause in a sentence, or a list of things. Therefor the commas will be placed as shown.
I pledge allegiance to the red, white, and blue flag.
My brother slowly picked up the spooky, wooden box with gold, silver, and copper inlay.
Step-by-step explanation:
Hope it helps! =D
I need the answers to this assignment it’s one questions but multiple steps
Solution;
[tex]\begin{gathered} D=305-50P \\ \end{gathered}[/tex][tex]\begin{gathered} Solving\text{ for P;} \\ 50P=305-D \\ P=\frac{305}{50}-\frac{D}{50} \\ P=\frac{61}{10}-\frac{D}{50} \end{gathered}[/tex][tex]\begin{gathered} When\text{ D=240 pints;} \\ P=6.1-\frac{240}{50} \\ P=\text{ \$}1.3 \end{gathered}[/tex]a potter forms a piece of clay into a right circular cylinder. as she rolls it, the height h of the cylinder increases and the radius r decreases. assume that no clay is lost in the process. suppose the height of the cylinder is increasing by 0.5 centimeters per second. what is the rate at which the radius is changing when the radius is 7 centimeters and the height is 6 centimeters?
The rate at which the radius is changing when the radius is 7 centimeters and the height is 6 centimeters is -0.8571 cm/s
dr/dt = -0.8571 cm/s
A cylinder's volume can be calculated using...
V = πr²h
For a constant volume, by differentiating with respect to t, we obtain...
0 = π(2rh·dr/dt + r²·dh/dt)
Finding for dr/dt, we have ...
dr/dt = dh/dt(-r²/(2rh)) = (dh/dt)(-r/(2h))
Filling in the given numbers gives ...
dr/dt = (0.5 cm/s)(-7 cm)/(2·6 cm)
dr/dt = -0.8571 cm/s
Therefore, the rate at which the radius is changing when the radius is 7 centimeters and the height is 6 centimeters is -0.8571 cm/s
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a square has an area of 169 mm2 what is the side of the length area
The side of the square with area 169 mm² is 13 mm.
The side of the square and it's area are related to each other by the following relation -
Area = side². According to the known fact, all the sides of the square are same..
Keep the value of area in formula to find the value of the length of the side of the square
169 = side²
Side = ✓169
Taking square root of the value of area to find the value of the length of the side of the square
Side = 13 mm
Therefore, the length of the side of the square is 13 mm.
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Lola’s pumpkin patch is selling 4 pumpkins for $10.00. At this rate, how many pumpkins can you buy for $37.50?
help please
Answer:
15 pumpkins.
Step-by-step explanation:
Lola is selling 4 pumpkins for $10 which means 1 pumpkin for $2.50, divide $37.50 by $2.50 & you get 15 pumpkins total.
(-r²s) (-3rs³) (-s²)
Answer: -3r³s⁶
Step-by-step explanation:
[tex](-r^2s)(-3rs^3)(-s^2)=\\\\(-3)(-r^2)(r)(s)(s^3)(-s^2)=\\\\-3(-r^{2+1})(-s^{1+3+2})=\\\\-3(-r^3)(-s^6)=\\\\-3r^3s^6[/tex]
Parvatis group brought in pizzas but is buying drinks at the concession stand. How many medium sellers can provide a group by the 20 bucks make a table to show your answer at the concession stand medium sodas cost $1.25.
i think the answer is 16 im not to sure tho sorry
14x(4+17)+38-11
A) 89
B) 99
C) 109
D) 321
Answer:
321
Step-by-step explanation:
14x(4+17)+38-11
(we solve what's in the brackets first)
=14x(21)+38-11
(we solve the multiplication)
=294 + 38 -11
=321
Determine which integer will make the inequality 2(n + 2) < 5(n − 1) true.
S:{10}
S:{3}
S:{2}
S:{0}
Answer:
10
Step-by-step explanation:
if you replace n with 10 you will get
2(10+2)<5(10-1)
2(12)<5(9)
24<45
which is a true statement if you replace n with any other number you will get a incorrect statement and if you replace n with 3 though they are equal it's not a ≤ it's only <
insert "c" or "g" in the blank to make it true {1,3,5} ____ {x|x is an odd counting number}
The correct sentence regarding the sets is given as follows:
{1,3,5} C {x|x is an odd counting number}.
Counting numbers and odd numbersThe set of counting numbers is composed by the non-negative numbers that are not decimals, hence they are given as follows:
{0, 1, 2, 3, 4, ...}
The set of odd numbers is composed by the numbers that are not divisible by 2, hence numbers that finish with digits 1, 3, 5, 7 or 9.
A set A is contained into another set B when it is a subset of the set B, that is, all of the elements of A belong to B. The symbol that represents if a set is contained into another is given by letter c.
In the context of this problem, we have that the elements 1, 3 and 5 are:
Odd numbers, as they are not divisible by 2.Counting numbers, as they are non-negative and non-decimal.Hence the set is contained, and the correct sentence is:
{1,3,5} C {x|x is an odd counting number}.
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Insert brackets to make this answer correct: 9 +32 x 10÷2=90
Answer:
the answer is not 90 its 169
Step-by-step explanation:
suppose there are two candidates for elected office. explain how the facts that a) voting might not be compulsory and b) resources are needed to finance reelection campaigns affect the conclusions of the median voter model.
The fact that voting might not be compulsory will make the voter ranks the candidate as their proximity, and the median voter wins the vote
The fact that resources are needed to finance reelection campaigns will make the probability of the median voter be in danger
According to median voter model theorem, at-least there must be two candidates
Being that we have two candidates for elected office, let's see how the following may affect the conclusions of the median voter model:
Part a
Voting might not be compulsory:
Here, voter ranks the candidates as per as their proximity, and the median voter will win the vote.
Part b
Resources are needed to finance re-election campaign :
When resources are needed to finance reelection campaign, none can cast their votes and it will distort this strategy. So the probability of median voter is in danger.
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4−32⋅(−0.25)−12÷1/3 help
Answer:
Your answer is 8.
Answer:
Step-by-step explanation:
-24
Mike Lasueze is a salesperson in the appliance department at Wicklow Appliance Inc. He is guaranteed a minimum salary of $220 per week or 5.5% of his total sales, whichever is greater. What is his gross pay for a week in which his total sales were $8,400?
For a sale of $8400 made his gross pay is $373.21
In this question, we have been given Mike Lasueze is guaranteed a minimum salary of $220 per week or 5.5 percent of his total sales, whichever is greater.
We need to find his gross pay for a week in which his total sales were $8,400
weekly pay = $220
commission = 5.5% of sales
= 0.055 of sales
Let m be the total sale and his gross pay be represented by y.
So, we get an equation for the total/gross pay:
y = 0.055x + 220
Required is the gross pay y for x = 8400
y = 0.055(8400) + 220
y = 682
Therefore, for a sale of $8400 made his gross pay is $373.21
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A group of 23 friends are at the theater but can't agree on which movie to see. some of the group decides to see lightyear which is playing for $4 per ticket and the rest of the group decides to see jurassic park which is playing for $9 per ticket. altogether the group spends $172, how many of them saw lightyear?
The number of people who watched light year are 7.
Let x= number of friends that watches light year
and y= number of friends that watches jurassic park.
Let the equations be
All together total cost => 4x+9y=172 ------> 1
And total number of people=> x + y=23 ------> 2
By multiplying both equations by 1 and 4 respectively we can get,
By Solving above two equations we get, x=7 and y=16
As X represents number of friends that watches light year, the answer is 7
Therefore, number of people that watches light year will be 7.
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Finding the dimensions of a rectangle given its perimeter and a...
The length of a rectangle is five times its width.
If the perimeter of the rectangle is 120 in, find its length and width.
length: 111
width: in
X
E
S
Answer:
Width = 10 in
Length = 50 in
Step-by-step explanation:
Define the variables
Let x be the width of the rectangle.If the length is five times its width, then the length of the rectangle is 5x.Given the perimeter is 120 in:
[tex]\begin{aligned}\textsf{Perimeter of a rectangle} & = 2(\sf width + length)\\120 & = 2(x + 5x)\\120 & = 2(6x)\\120 & = 12x\\\dfrac{12x}{12}&=\dfrac{120}{12}\\\implies x&=10\end{aligned}[/tex]
Solution:
Width = 10 inLength = 5 × 10 in = 50 in