Reeta has spent 2/7 of her salary on car repair work. She has 15,000 rupees left with her. what is her salary?

Answers

Answer 1

Answer 15489 Rupees

Step-by-step explanation:

Total parts= 7+2=9 parts

total salary= 9x
taken salary for car repair= 2x/7
remaining salary= 15000 rupees

9x-2x/7= 15000
(63x-2x)/7=15000
61x/7=15000

61x=105000
x= 105000/61
x= 1721(approx)

Total salary= 9x
                   = 9*1721
                   =15489 rupees


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Related Questions

Find the smallest pair of 4-digit numbers such that the difference between them is 303 and their hcf is 101.

Answers

The smallest pair of 4-digit numbers such that the difference between them is 303 and their HCF is 101 are 1010 and 1313.

HCF (Highest Common Factor) of two numbers, which is the largest number that divides both numbers evenly.

Let's call the smaller of the two numbers "x". The larger number would be "x + 303".

The HCF of these two numbers must be 101, which means that 101 must be a factor of both x and x + 303.

To find the smallest possible value of x, we need to find the smallest number that is divisible by 101 and also a 4-digit number.

The smallest multiple of 101 that is a 4-digit number is

=> 101 x 10 = 1010.

Therefore, x = 1010.

The larger number would be

=> x + 303 = 1010 + 303 = 1313.

To check if the HCF of these two numbers is indeed 101, we can use the Euclidean Algorithm or the Prime Factorization method to find the HCF.

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3 cm
20 cm
8 cm
5 cm
Find the lateral surface area of the solid above.

Answers

Answer:

Step-by-step explanation: 320 cm sq

PLEASE HELPPPP I DONT UNDERSTAND ITTT

Answers

According to the information, we need 107.42ft of black cord and 26 yards of fabric to make the design.

How to find the amount of black cord we need?

To find the amount of black cord that we need in this design we must calculate the perimeter of all the figures as shown below:

rectangle

16ft + 16ft + 10ft + 10ft = 52ft

Square

7ft + 7ft + 7ft + 7ft = 28ft

triangle

2ft + 2ft + 2ft = 6ft

Circle

2*3.14*1.5=9.42ft

Total

9.42ft + 24ft + 28ft + 52ft = 107.42ft

How much fabric do we need?

To calculate the amount of fabric, we must find the visible area of the figures and calculate what the area is in yards.

rectangle:

16ft*10ft=160ft

Square:

7ft*7ft=49ft

Triangle:

1.73ft * 2ft / 2 = 1.73ft1.73*4=6.92ft

Circle:

3.14*1.5²=7.06ft

160ft - 49ft = 11ft49ft - 8ft - 6.92ft = 34.08ft

160ft * 0.11 = 17.6 = 18 yards49ft * 0.11 = 5.39 = 6 yards6.92ft * 0.11 = 0.76 = 1 yard7.06ft * 0.11 = 0.77 = 1 yard

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Find f(4) for f(x) = x3 - 2x2 + 3x - 7

I'm not sure how to find out the x in f(x) in equations like this. Any help understanding this would be appreciated.

Answers

Answer:37

Step-by-step explanation:

just write 4 instead of x

f(4)=[tex]4^{3} -2*4^{2} +3*4-7=64-32+5=37[/tex]

mai poured 2.6 of water into a partially-filled pitcher. the pitcher now contains 10.4.mai wants to know how many liters of water was originally in the pitcher.

Answers

Answer:

Step-by-step explanation:

Let's call the original volume of water in the pitcher "V". Then, after Mai added 2.6 liters, the total volume of water in the pitcher became V + 2.6 = 10.4 liters.

To find the original volume of water in the pitcher, we can isolate V by subtracting 2.6 from both sides of the equation:

V + 2.6 = 10.4

V = 10.4 - 2.6

V = 7.8 liters

So the original volume of water in the pitcher was 7.8 liters.

Answer: 7.8

Step-by-step explanation:

really sorry if im wrong

Help please helpppppppppppppppp

Answers

15x = 180

divide both by 15, and you get

x = 12

I'm unsure if this is correct

 Answer: Subtract the sum of the two angles from 180 degrees. The sum of all the angles of a triangle always equals 180 degrees. Write down the difference you found when subtracting the sum of the two angles from 180 degrees

what is the answer to this?

Answers

Answer:

Step-by-step explanation:

If I see this correctly it would be about 16 minutes he played football.

what are 2 equations for d 2 miles and t 30 minutes

Answers

two equations are: v = u + 0.5a and (v)² = (u)² + 4a.

What is expression?

Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement. It's possible to multiply, divide, add, or subtract with this mathematical operation.

Given, the distance traveled by an object in t = 30 minutes is 2 miles

Let "v" be the final velocity of an object,

"u" be the initial velocity of an object,

and "a" be the acceleration of an object.

From the standard velocity equation:

final velocity = initial velocity + acceleration * time.....(1)

(final velocity)² = (initial velocity)² + 2*acceleration * distance....(1)

From equation (1)

v = u + a*30 minutes

time in hours,

v = u + 0.5a

From equation (2)

(v)² = (u)² + 2*a* 2

(v)² = (u)² + 4a

therefore, two equations are: v = u + 0.5a and (v)² = (u)² + 4a.

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I need help with this please and thank you.

Answers

Answer:

(3x -4 ) (x^2 -5x -1) multiply the binomial by trinomial3×^3 -15x^2 -3x -4x^2 +20x +4group like terms , then get your answer as3x^3 -19x^2 +17x +4

World War II began in the year 1939.
Let x represent any year. Write an inequality in terms
of x and 1939 that is true only for values of x that
represent years before the start of World War II.

Answers

The Inequality to represent year is x < 1939.

What is Inequality?

Mathematical expressions with inequalities are those in which the two sides are not equal. Contrary to equations, we compare two values in inequality. Less than (or less than or equal to), greater than (or greater than or equal to), or not equal to signs are used in place of the equal sign.

Given:

Let x represent any year.

If we want years before 1939, then x must be less than 1939.

Then, the Inequality can be

x < 1939.

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pls help me on all questions if you can

Answers

All the answers to the questions except which are impossible are illustrated below.

What is a polygon?

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 are referred to as its edges or sides.

9. We know, The sum of all the interior angles of a 'n' sided polygon is,

= 180(n - 2).

= 180(10 - 2).

= 180×8.

= 1440°.

11. 180(n - 2) = 1260.

180n - 360 = 1260.

180n = 1620.

n = 9.

13. Mesure of exterior angles is,

= 360/n.

= 360/5.

= 72°.

14. 360/60 = 6 sides, As EA = 360/n, n = 360/EA.

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What are the outliers in this data set?

26, 51, 53, 57, 57, 62, 65, 71, 93

Select EACH correct answer.

Answers

Answer:

What are the outliers in this data set?

26, 51, 53, 57, 57, 62, 65, 71, 93

Select EACH correct answer.

26, 71, 93

Step-by-step explanation:

Tell me if I'm wrong, You're welcome.

Which display is most likely to reveal association between X and Y ? A. Dot plot B. Scatter plot C. Histogram D. Pareto chart

Answers

Scatter plot Answ

Step-by-step explanation:

Solve by substitution
**Pls explain answer
y = -6x + 5
-2x + y = 5

Answers

Answer: 0,5

x = 0
y = 5

Answer: (0,5)

Step-by-step explanation:

Since "y" is equal to -6x+5 everywhere you see a "y" you can replace it with -6x+5.

-2x-6x+5=5

Combine like terms

-8x+5=5

Isolate x (subtract 5 from both sides)

-8x=0

Solve for x

x=0

Now that you have the value for "x" you can substitute the value into either equation and solve for y

-2(0)+y =5

y=5

or

y=-6(0)+5

y=5

The radius of a circle is 21 m. Find its area to the nearest whole number.

Answers

Answer: A≈1385.44m²

Step-by-step explanation:

A=πr2=π·212≈1385.44236m²

Area of a circle = Pi x radius squared
21 x 21 = 441
441 x pi = 1385.44

Área = 1385.44

A quadrilateral has two angles that measure 232° and 86°. The other two angles are in a ratio of 4:17. What are the measures of those two angles?

Answers

The two missing angles of the quadrilateral are 10.5° and 2.47°, calculated from the given angles of 232° and 86°, and a ratio of 4:17.

The angle sum of a quadrilateral is 360°. Therefore, we need to find the sum of the two missing angles.We can start by subtracting the two known angles from the total angle sum and then dividing the difference by the ratio given.

360° - 232° - 86° = 42°

To find the two missing angles, divide the sum by the ratio given.

42° ÷ 4:17

The find the measure of the first angle, divide 42° by 4:

42° ÷ 4 = 10.5°

To find the measure of the second angle, divide 42° by 17:

42° ÷ 17 = 2.47°

Therefore, the two missing angles of the quadrilateral are 10.5° and 2.47°.

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Does someone mind helping me with this? Thank you!

Answers

The required equation which intersects the points (12, -2) and (6, -8) in the point-slope form is y+2 = x-12.

What is point-slope form?

The general form of a linear equation is y-y1=m(x-x1). It draws attention to the line's slope and one of the line's points (that is not the y-intercept).

To understand more about it and see some instances, watch this video.

Both the slope-intercept form and the point-slope form can be used to write the equation of a straight line.

The slope and ANY point on the line are highlighted using the point-slope form.

Slope intercept form merely shows the slope and the y-intercept of a line.

So, we have:

m = 1

And points are (12, -2) and (6, -8)

We need to use the points: (12, -2)

Now, form the equation as follows:

y - (-2) = m (x-12)

y + 2 = 1(x-12)

y+2 = x-12


Therefore, the required equation which intersects the points (12, -2) and (6, -8) in the point-slope form is y+2 = x-12.

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Exactly $9 was used to purchase an equal number of each of the three types of tokens
$0.10, $0.15 and $0.20, how many of each type of tokens were purchased?
A)45
B)30
C)25
D)20
E)15

Answers

Answer:

The answer is 20, so the answer is (D) 20.

Step-by-step explanation:

Let's say x is the number of tokens purchased for each of the three types. Then, the total amount spent is 0.10x + 0.15x + 0.20x = $9.

Combining like terms, we get 0.45x = $9.

Finally, dividing both sides by 0.45, we get x = 20.

So, 20 tokens were purchased for each of the three types.

The answer is 20, so the answer is (D) 20.

fuel pressure in the fuel tank of the space shuttle is decreasing at a rate of r(t)= 17e^-0.1t psi per second at time t in seconds. at what rate is pressure decreasing at 15 seconds

Answers

The pressure is decreasing at a rate of approximately 0.26 psi/s at t = 15 seconds.

What is pressure ?

In physics, pressure is the amount of force applied per unit area. It is a scalar quantity, which means that it has a magnitude but no direction. Pressure is typically denoted by the symbol P, and its units are commonly expressed in pascals (Pa), which is the SI unit of pressure.

Pressure can be defined as the amount of force F applied per unit area A:

P = F / A

For example, if a force of 100 newtons (N) is applied to an area of 2 square meters (m^2), then the pressure would be:

P = 100 N / 2 m^2 = 50 Pa

Pressure is an important concept in many areas of physics, including fluid dynamics, thermodynamics, and atmospheric science. It is commonly used to describe the behavior of gases and liquids under different conditions, such as changes in temperature or volume. Pressure can also be used to calculate other physical properties, such as the flow rate of a fluid or the speed of sound in a gas.

According to given condition :

The rate of change of the fuel pressure in the fuel tank of the space shuttle is given by the derivative of the function [tex]r(t) = 17e^(-0.1t)[/tex]psi per second with respect to time t. Taking the derivative of r(t), we get:

[tex]r'(t) = (-0.1) * 17e^(-0.1t)[/tex]Simplifying this expression, we get:

[tex]r'(t) = -1.7e^(-0.1t)[/tex]

To find the rate at which the pressure is decreasing at t = 15 seconds, we substitute t = 15 into the expression for r'(t):

[tex]r'(15) = -1.7e^(-0.1*15)[/tex]

r'(15) ≈ -0.26 psi/s

Therefore, the pressure is decreasing at a rate of approximately 0.26 psi/s at t = 15 seconds.

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Can somebody help me on this? I answered all of them on the right side but I don’t know if it’s right. The answer choices are- additive property of angle measure / additive property of length / all right angles are congruent / alternate interior angles theorem / angle side angle / definition of angle bisector/ definition of equilateral triangle / definition of midpoint / given/ and reflexive property of congruence. I know this a lot but that is all the answer choices.

Answers

The completed two-column table that proves ΔQTU is congruent to ΔRSU can be presented as follows;

Statement          [tex]{}[/tex]                           Reasons

1. [tex]\overline{RS}[/tex] ⊥ [tex]\overline{RT}[/tex]                          [tex]{}[/tex]          Given

2. [tex]\overline{QT}[/tex] ⊥ [tex]\overline{QS}[/tex]                         [tex]{}[/tex]          Given

3. [tex]\overline{QU}[/tex] ≅ [tex]\overline{RU}[/tex]                              [tex]{}[/tex]    Given

4. ∠Q ≅ ∠R [tex]{}[/tex]                                  All 90° angle are congruent

5. ∠QUT ≅ ∠RUS [tex]{}[/tex]                        Vertical Angle Theorem

6. ΔQTU ≅ ΔRSU [tex]{}[/tex]                        ASA

What are congruent triangles?

Congruent triangles are triangles that have the same size and shape.

The details of the reasons that are used to prove that the triangles ΔQTU and ΔRSU are congruent, can be presented as follows;

All 90° angle are congruent

The segments [tex]\overline{RS}[/tex] and [tex]\overline{RT}[/tex] are perpendicular, which indicates that the angle ∠R is a 90° angle. Similarly, segments [tex]\overline{QT}[/tex] and [tex]\overline{QS}[/tex] are perpendicular, therefore, ∠Q is a 90° angle, which indicates that we get;

m∠Q = m∠R = 90°

The definition of congruent angles, indicates; ∠Q ≅ ∠R

Vertical Angle Theorem

The vertical angle theorem states that the vertical angles formed by two intersecting lines are congruent.

ASA

The Angle-Side-Angle, (which can be abbreviated as ASA) congruence postulate states that if two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, then the two triangles are congruent.

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If a hexagon represents 1 whole, what fraction does each of the following shapes represent? Be prepared to show or explain your reasoning

Answers

The triangle represents 1/4 of the whole trapezoid, the rhombus represents 1/2 of the whole trapezoid, and the hexagon represents 1/1 of the whole trapezoid.

Determine the fraction

Each of the shapes represent a different fraction of the whole trapezoid.

The triangle represents 1/4 of the whole trapezoid. This is because there are four triangles in the trapezoid, and each one is equal in size. Therefore, each triangle is 1/4 of the whole trapezoid. The rhombus represents 1/2 of the whole trapezoid. This is because there are two rhombuses in the trapezoid, and each one is equal in size. Therefore, each rhombus is 1/2 of the whole trapezoid.

The hexagon represents 1/1 of the whole trapezoid. This is because there is only one hexagon in the trapezoid, and it is equal in size to the whole trapezoid. Therefore, the hexagon is 1/1, or the whole trapezoid.

In conclusion, the triangle represents 1/4 of the whole trapezoid, the rhombus represents 1/2 of the whole trapezoid, and the hexagon represents 1/1 of the whole Hexagon. These fractions can be used to determine the value of each shape in relation to the whole trapezoid.

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HELP PLEASEEEEEEEEEEEEE

Answers

Answer: look at the image for the answers and solutions

Step-by-step explanation:

Im so lost myself try copying and pasting it

A fifth-degree polynomial function has a zero at r = -3 with a multiplicity
of 2. It also has a zero at r = 2 with a multiplicity of 3. The value of the
function is negative when I = −4.
Which graph could model this polynomial function?

Answers

Answer:

The graph that could model this polynomial function will be a fourth-degree function.

Step-by-step explanation:

It will have two roots at r = -3 and r = 2, and it will cross the x-axis twice at both those roots.It will also be negative for all values below -4, which means that it will also cross the x-axis two times above r = -4.

How do you use logarithmic differentiation to find the derivative of the function?

Answers

Answer: Logarithmic differentiation when the logarithm of an expression can be written in a form for which we can find the derivative more simply. Or, for which we can find the derivative at all.

The breadth of a rectangle is half of its length. If its perimeter is 76m,find its length and breadth.​

Answers

The length and breadth of the rectangle are 25.33 meters and 12.67 meters,

What is a rectangle?

A rectangle is a quadrilateral having four sides and the sum of the angles is 180 in the rectangle the opposite two sides are equal and parallel and the two sides are at 90-degree angles.

We are given that the breadth of the rectangle is half of its length, so we can write:

B = 0.5L

We are also given that the perimeter of the rectangle is 76m. The perimeter of a rectangle is the sum of the lengths of all four sides, which in this case is:

Perimeter = 2(L + B)

Substituting the value of B from the first equation, we get:

Perimeter = 2(L + 0.5L)

Perimeter = 2(1.5L)

Perimeter = 3L

Now we can solve for L:

3L = 76

L = 25.33

So the length of the rectangle is 25.33 meters.

To find the breadth, we can substitute this value of L back into the first equation:

B = 0.5L

B = 0.5(25.33)

B = 12.67

So the breadth of the rectangle is 12.67 meters.

Therefore, the length and breadth of the rectangle are 25.33 meters and 12.67 meters, respectively.

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10. Sleeping 8 hours a day is the same as sleeping 10 days a month. How many days is this per year?​

Answers

If there are 10 days of sleeping a month then in a year there are 120 days of sleeping.

What is Unitary Method?

The unitary technique involves first determining the value of a single unit, followed by the value of the necessary number of units.

For example, Let's say Ram spends 36 Rs. for a dozen (12) bananas.

12 bananas will set you back 36 Rs. 1 banana costs 36 x 12 = 3 Rupees.

As a result, one banana costs three rupees. Let's say we need to calculate the price of 15 bananas.

This may be done as follows: 15 bananas cost 3 rupees each; 15 units cost 45 rupees.

Given:

Sleeping 8 hours a day is the same as sleeping 10 days a month.

In according to hours the number of hours sleeping in month will be

= 8 x 30

= 240 hours

= 240 / 24

= 10 days

So, in a year the number of days of sleeping is

= 10 x 12

= 120 days

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2. In a bag of fruit Skittles, the ratio of strawberry to orange to lemon-lime is 4: 3:7. There are 56 Skittles in a bag.
Find the number of lemon-lime Skittles in the bag.

Answers

Answer:

28

Step-by-step explanation: 4+3+7=14

                                              56/14=4

                                              7*4=28

Answer:

28

Step-by-step explanation:

4x+3x+7x = 56

14x=56

x=4

7x ---> 7(4) ---> 28

So there are 28 lemon lime skittles in a bag

Are the lines with the equation y = -5x + 1 and y = -5x + 8 parallel? (use a graph, might help)

Answers

Answer:

Yes, the lines y = -5x + 1 and y = -5x + 8 are parallel. This is because they have the same slope (-5) but different y-intercepts (1 and 8). Parallel lines have the same slope, and different y-intercepts.

Answer:

For y = -5x + 1

x = [tex]\frac{1-y}{5}[/tex].

And

y = 1 - 5x.

Put on a graph: look at picture 1.

The for y = -5x + 8

x = [tex]\frac{8-y}{5}[/tex]

And

y = 8 - 5x.

Put on a graph: look at picture 2.

These two lines are parallel.

The legs of a right triangle have lengths of
2x + 3 and 4x - 1. Which polynomial is equivalent
to c²?
A 6x + 2
B 4x² + 12x + 9
C 20x² + 4x + 10

D 36x² + 24x + 4

Answers

We can use the Pythagorean theorem, which states that for a right triangle with legs of lengths a and b, and hypotenuse of length c, the following relationship holds:

a² + b² = c²

In this case, the lengths of the legs of the right triangle are 2x + 3 and 4x - 1. We can use these values to set up the equation:

(2x + 3)² + (4x - 1)² = c²

Simplifying the left-hand side:

4x² + 12x + 9 + 16x² - 8x + 1 = c²

20x² + 4x + 10 = c²

Therefore, the polynomial equivalent to c² is C) 20x² + 4x + 10.

Can a continuous random variable take all values in an interval?

Answers

A continuous random variable can take all values in an interval, assuming that the interval is unbounded.

This is because a continuous random variable has an infinite number of possible outcomes, and the probability density function (PDF) of a continuous random variable is defined over a range of values rather than specific values.

For example, consider the normal distribution, which is a common continuous probability distribution. The PDF of a normal distribution is a bell-shaped curve that extends from negative infinity to positive infinity.

This means that a continuous random variable following a normal distribution can take any value on the real number line, with some values being more likely than others.

However, if the interval is bounded, then it is possible for a continuous random variable to not take all values within the interval. In this case, the probability density function is zero outside of the interval, and the random variable is restricted to the range of values within the interval.

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Other Questions
The illustration below shows two boxes on opposite ends of a massless board that is 3.0 m long. The board is supported in the middle by a fulcrum. The box on the left has a mass (m) of 25 kg, and the box on the right has a mass (m2) of 15 kg. How far should the ful- crum be positioned from the left side of the board in order to balance the masses horizontally? A. 0.38 m C. 1.1 m B. 0.60 m (D. 1.9 m) 6 m2 true or false statement, martha nussbaum believes that it can be useful to teach philosophy to children at a young age because it is possible that parents can sometimes make bad arguments that should be questioned. anti-imperialist's efforts in the late 1800s led the u.s. to focus its foreign policy on____ A student wrote the following code for a guessing game.Line 1: secretNumber = RANDOM (1, 100)Line 2: win = falseLine 3: REPEAT UNTIL (win)Line 4: {Line 5: DISPLAY ("Guess a number.")Line 6: guess = INPUT ()Line 7: IF (guess = secretNumber)Line 8: {Line 9: DISPLAY ("You got it right!")Line 10: }Line 11: ELSELine 12: {Line 13: IF (guess > secretNumber)Line 14: {Line 15: DISPLAY ("Your guess is too high.")Line 16: }Line 17: ELSELine 18: {Line 19: DISPLAY ("Your guess is too low.")Line 20: }Line 21: }Line 22: }While debugging the code, the student realizes that the loop never terminates. The student plans to insert the instruction win = true somewhere in the code. Where could win = true be inserted so that the code segment works as intended?answer choicesa. Between line 6 and line 7b. Between line 9 and line 10c. Between line 20 and 21d. Between line 21 and 22 For the matrix below. Find a basis for R3 that includes vectors in the set by removing vectors from a linearly dependent set and/or adding vectors to a set that does not span R3. Beginning accounts receivable were $20,000 and ending accounts receivable were $25,000. If sales were $150,000, cash receipts equal $___. Which of the following statements is NOT correct?All PPO plans require you to select a primary care physician from your list of preferred providers.Health care professionals that are not a part of the PPO are considered out-of-network.The health care professionals that make up a PPO are preferred providers and are considered in-network.A PPO is a type of health insurance, which is a type of insurance that is used to help cover the cost of medical treatment. What is 20% of 350000? What is the length of the missing side of the quadrilateral shown if the perimeter is 5x+3 and 8x-4 and 10x+7 A direct cost is a cost that can be traced to cost object and indirect cost is a cost that cannot be traced to a cost object. So the classification as direct or indirect depends on the cost object. el... The vertices of parallelogram HIJK are H(0, -1), I(2, 3), J(7, -1), K(5, -5). Determine if HIJK is a parallelogram. which of the following are legal theories of discrimination? (select all that apply.) multiple select question. statistical disparity disparate impact reasonable accommodation disparate treatment add v to 5, then add 2 to the result Which step is incorrect? The body is adorned or altered in some way in every culture. Decorating the self serves a number of purposes. Which of the following is NOT one of those purposes?A) To indicate negative feelings towards oneselfB) To separate group members from nonmembersC) To place the individual in the social organizationD) To provide a sense of security HELP: Three vertices of a parallelogram are shown in the figure below.Give the coordinates of the fourth vertex. if f is differentiable at a must f be continuous at aa. No. If f is differetiable at a, then f is not continuous at a. The contrapositive of this statement therefore states, if f is continuous at a, then f is not differentiable at a.b. Yes. If f is differentiable at a, then f is continuous at a. the contrapositive of this statement therefore states, if f is continuous at a, then f is differentiable at a.c. No. If f is continuous at a, it is not necessarily true that the limit that defines f' exists at a.d. Yes. if f continuous at a, it is necessarily true that the limit that defines f' exists at a. For each ornament that a worker makes, he is paid $1.15. He makes 4 ornaments every 15 minutes. Find the amount earned by the worker if he works for 3 hours. please reply asap!20 points :) What are the 5 foundations of personal finance? describe the observations during the aqueous sodium bicarbonate wash. draw the chemical reaction occurring that explains this observation