Which method used to determine numbers of bacteria in a sample involves the preparation of a series of dilutions of the sample in sterile water, adding measured volumes of each dilution to melted nutrient agar plates, making pour plates, incubating, counting colonies, and multiplying colony counts by dilution factors to determine the number of bacteria in the sample

Answers

Answer 1

Answer:To obtain a readily counted and statistically accurate number of bacteria. When performing a standard plate count using the pour plate method, the dilutions are first made, and then measured aliquots of each dilution are cultured.

Step-by-step explanation:


Related Questions

A jewelry supply shop buys silver chains from a manufacturer for c dollars each, and then sells the chains at a 57-percent markup. Write the markup as a decimal, A expression for the retail price silver chain, a retail price of a silver chain purchased for 45 dollars, and how much was added to the original price of the chain

( if you answer all the questions i will mark you the Brainy-est. )

Answers

The amount added to the original price of the jewelery is the Markup price. Hence, the amount added is $16.34

Markup = 57% = 0.57Cost of jewellery = cRetail price = $45

Retail price = cost of jewellery + Markup

$45 = c + 0.57c

45 = 1.57c

Divide both sides by 1.57

c = 45/1.57

c = $28.66

The Markup price = (Retail price - Original price)

Markup = $45 - $28.66 = $16.34

Therefore, the amount added to the original price is $16.34

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Are the shapes similar?



a
Yes
b
No
c
It cannot be determined.

Answers

The answer is no because the numbers on both shapes are different

5)
4 mm
2 mm
5 mm
3 mm
Perimeter:
Area:

Answers

Answer:

perimeter - 4+2+3+2+5= 16mm

Area -5×4=20mm²

State the domain and range of the following function.

Answers

Answer:

Answer C

Step-by-step explanation:

seeing as how the x coordinates of the points are 2,3,4,6,7, we know that the answer must have these numbers, and only these numbers, as the domain. The only answer that has that is answer C.

-3x + 18 = 7x solve

Answers

Answer:

refer to the attachment

Step-by-step explanation:

hope that helps

Answer: x = 1.8

-3x + 18 = 7x
First, isolate the variable. There’s a couple ways to do this. One is to subtract 7x from each side and subtract 18 from each side. The other is to add 3x to both sides. Either way, you end up with all the variables on one side and the rest on its own.

This would give us either…
-10x = -18
OR
18 = 10x

From there, divide by 10 to get a single x

-x = (-18/10)
-x = -1.8
Multiply each by -1 to find what positive x equals
x = 1.8
OR
(18/10) = x
1.8 = x

rewrite the equation in slope-intercept form 5x - 6y = 12

Answers

Answer:

M = [tex]\frac{5}{6}[/tex] Is correct answer

Step-by-step explanation:

Write in slope-intercept form,  y = m x + b.

m = [tex]\frac{5}{6}[/tex]

Graph in pic

(Hope this helps can I pls have brainlist (crown)☺️

Can someone help me, please?

Answers

The value of AE is 112 thanks to the Triangle Midsegment Theorem. Hope this helps!

how can I Simplify 13⁰ this ​

Answers

The answer is 1. Please mark brainelist

[tex] = \frac{13\pi}{180} \\ \\ in \: \: alternate \: form \\ \\ = 0226893[/tex]

hope it helps

The probability that a red block is selected from a bucket is
3/8, and the probability that a blue block is selected is 2/8.
What is the probability that a red block or a blue block is
selected?
a) 1
b) 1/2
c) 5/8
d) 6/8

Answers

Answer:

5/8

Step-by-step explanation:

Since we don't know what the other color (s) are, all we need to do to determine the probability is add the two fractions, and that is your probability.

Answer:

5/8

Step-by-step explanation:

The probability of a red block shows 3/8.  This means there are 8 blocks total and only 3 of them are red.

The probability of a blue block shows 2/8.  Again there are 8 total blocks and only 2 are blue.

So the total number of blocks remains the same....8

The total of red and blue blocks is 3 + 2 = 5

So the probability would be 5/8

10 yd
9 yd
Perime
Perimeter:
Area:
IsheetWorks.com

Answers

Step-by-step explanation:

hdhjdjddjjshsjaoauqgsvdkdjvevw ossjbwjwkwhwvw iehwuqgvdhsjshsdhdhdj shjesjvv

Step-by-step explanation:

The area = 9 × 10 = 90

the perimeter = 2(9 + 10) = 38

pleae give me a brainliest answer

The total area of Russian is about 20,000,000

Answers

Answer: 19,990,000 times

Step-by-step explanation: Land area of Russia = 20000000

Land area of Puerto Rico = 10000

20000000 -  10000 = 19,990,000

Simplify the expression to a + bi form:
(1 – 8i) + (8 + 6i)

Answers

I think the answer would be 9-2i

write the equation
it passes through (0,-2) and is perpendicular to the graph of y=5x+7

Answers

Step-by-step explanation:

the line passes through (0,-2) and perpendicular to the graph of y=5x+7.

solution :

the slope = -1/5

the equation :

y+2 = -1/5 (x-0)

y = -1/5x - 2


[tex] \sqrt[5]{1150? } = [/tex]
please give me a answer please ​

Answers

=4.0939
If you only need 1 d.p then it’s 4.1

please help I will make Brainliest if correct (show working)​

Answers

Answer:

I beleive X=2

Area is 24

Step-by-step explanation:

X=2 because the side with B has 4cm and on the other it has 6 but the 4 can be put into 6 and 6-4 is 2 if that made any sense

The area is 4 times 2= 8 and then 8 times 2 is 16

16+8=24

what 5 divided by 475

Answers

Answer:

it's 0.01 (approx.)

Step-by-step explanation:

brainliest plz

Answer:

0.010526315789

OR

0.011

-9 + ( -16) =

( -4) – (-6) + (-5) – (8) =

( 3) – (-9) + (-3) – (-2) =

- ( 5) – (-7) + (-8) =

- ( -8) – (-9) + (-4) – (-1) =

( -5) – (-11) + (10) – (8) =

( -1) – (-2) + (-3) – (-6) =

( -4) – ( 4) – (6) + (-5) – (-8) =

(-6) + (-5) – (-8) =

Answers

Answer:

-9 + ( -16) = -25

( -4) – (-6) + (-5) – (8) =-11

( 3) – (-9) + (-3) – (-2) =11

- ( 5) – (-7) + (-8) =-6

- ( -8) – (-9) + (-4) – (-1) =14

( -5) – (-11) + (10) – (8) =8

( -1) – (-2) + (-3) – (-6) =4

( -4) – ( 4) – (6) + (-5) – (-8) =-11

(-6) + (-5) – (-8) =-3

Step-by-step explanation:

Hope it helps

Answers:

-9 + ( -16) = -25

( -4) – (-6) + (-5) – (8) = -11

( 3) – (-9) + (-3) – (-2) = 11

- ( 5) – (-7) + (-8) = -6

- ( -8) – (-9) + (-4) – (-1) = 14

( -5) – (-11) + (10) – (8) = 8

( -1) – (-2) + (-3) – (-6) = 4

( -4) – ( 4) – (6) + (-5) – (-8) = -11

(-6) + (-5) – (-8) = -3

can someone pls help me with number 5 pls show your work so i can understand thanks

Answers

Step-by-step explanation:

Let's represent Aaron's age with x and

Charlene's age with x+8

x+x+8=44

2x+8=44

2x=44-8

2x=36

x=36÷2

x=18

Aaron is 18 years old.

While Charlene is 18+8=26 years old.

Hope this helps!

Find last​ year's salary​ if, after a 5% pay​ raise, this​ year's salary is 35,175

Answers

Answer:

Step-by-step explanation:

x + 0.05x = 36225

x(1 + 0.05) = 36225

x*1.05 = 36225

by solving we find:

x = $34,500

PLSSS HLEPP ME OUTT ITS URGENTTTT!!​

Answers

increase in x results in the decrease in y

Answer:

• Decrease in x results in the increase in y

• Increase in x results in the decrease in y

What value of x satisfies the equation 5(x – 3) – 2(x + 1) = 4?

Answers

Answer:

x = 7

Step-by-step explanation:

To solve:

Distribute 5 among everything inside the first parentheses. You'll get 5x - 15.

Next distribute -2 among everything in the second parentheses. You'll get

-2x - 2.

All together: 5x - 15 -2x - 2 = 4

Now combine like terms:

5x - 2x = 3x and -15 - 2 = - 17

All together: 3x - 17 = 4

Add 17 on both sides to get 21, and then divide both sides by 3. Answer is x = 7.

________________________________

Last, don't forget to check your work.

You can plug in 7 for x to get:

5(7 - 3) = 20

5 × 7 = 35

5 × -3 = -15

35 - 15 = 20

-2(7 + 1) = -16

-2 × 7 = -14

-2 × 1 = - 2

-14 -2 = -16

20 - 16 = 4

⬆⬆⬆Therefore this is correct.

Sorry this is a bit lengthy, but hope this helps :)

4/8+2/4= pls help you get 20 points if you do

Answers

Answer:

1

Step-by-step explanation:

use BEDMAS here:

4 divided by 8 is 1/2 or 0.5

2 divided by 4 is 1/2 or 0.5

now adding these two gives you:

1/2 + 1/2 = 1

help with this question

Answers

Answer:

C) (x-3)(x+3)

Note:

Just a tip there is an app called Desmos where you can put in equations like this and it will graph them for you.

Someone plz help me :(

Answers

Answer:

C is the correct answer.

Step-by-step explanation:

Answer:

the anserew is all c hope this helps sorry if it dont and sorry i cant spell

if the price of an item before tax is £720 and the tax percentage is 25%, what is the selling price?

Answers

720 x 1.25 = £900
Original x percent needed (125%) = total price

Identify the segment bisector of XY.

n

5x + 8

9x + 12

Х

M

1

ОХМ

Ο Χ

O line n

O YM

The length of XY is

Answers

Given the image attached, the segment bisector that divides XY into two and the length of XY are as follows:

Segment bisector of XY = line nLength of XY = 6

Recall:

A line that divides a segment into two equal parts is referred to as segment bisector.

In the diagram attached below, line n divides XY into XM and MY.

Thus, the segment bisector of XY is: line n.

Find the value of x:

XM = MY (congruent segments)

Substitute

[tex]5x + 8 = 9x + 12[/tex]

Collect like terms and solve for x

[tex]5x + 8 = 9x + 12\\5x - 9x = -8 + 12\\\\-4x = 4\\\\x = -1[/tex]

XY = XM + MY

[tex]XY = 5x + 8 + 9x + 12[/tex]

Plug in the value of x

[tex]XY = 5(-1) + 8 + 9(-1) + 12\\\\XY = -5 + 8 -9 + 12\\\\\mathbf{XY = 6}[/tex]

Therefore, given the image attached, the segment bisector that divides XY into two and the length of XY are as follows:

Segment bisector of XY = line nLength of XY = 6

Learn more here:

https://brainly.com/question/19497953

HELP PLEASE HELP HELP HELP HELP​

Answers

Answer:

always first sum

Step-by-step explanation:

for example: 1+2/1-2=3

                     2+2/2-1=4



Find the value of each of the variables.
A X = 12, y = 15, z = 20
B. X = 9,7 = 15,2 - 20
C. X = 9,y = 18,2 = 20
D. X = 12, y = 18,2 = 20

Answers

Answer:B

Step-by-step explanation:

B

2 1/3 + 3 1/4 as a fraction

Answers

2 1/3 = 7/3
3 1/4 = 13/4
Make like denominators
(7/3)(4/4) = 28/12
(13/4)(3/3) = 39/12
Then add across
67/12 (improper fraction)
in mixed number form: 5 7/12

Answer:

67/12  (just in case if they would ask you for the simplified form the answer in is 5 7/12)

Step-by-step explanation:

convert both mixed fractions to improper fractions first

2 1/3 = 7/3    3 1/4 = 13/4

(cross multiplication method, to make both fractions have the same denominator)

7/3 + 13/4

7/3 × 4/4 = 28/12

13/4 × 3/3 = 39/12

28/12 + 39/12 = 67/12 (just add, denominator will remain the same)

67/12 (simplify)

67/12 = 5 7/12 (simplified)

a recreational club charges a one time $20 membership fee and $3 for use of the pool

i just need an answer and step by step work of it someone help me please.​

Answers

Answer:

what is the question asking?

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