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lara31 [8.8K]
3 years ago
15

I NEED HELP PLEASE!!!!!

Mathematics
1 answer:
larisa86 [58]3 years ago
6 0

Answer:A sample has a density of 1.37 * 10^5 CFU/mL. Whatsample volume should yield a countable plate? Which two dilutiontube could be used to produce this sample volume? How?

Step-by-step explanation:A sample has a density of 7.9 * 10^9 CFU/mL. What samplevolume should yield a countable plate? Which two dilution tubecould be used to produce this sample volume? How?

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Pls Help!!! Worth 99 Pts!!
Alenkasestr [34]
First, for end behavior, the highest power of x is x^3 and it is positive. So towards infinity, the graph will be positive, and towards negative infinity the graph will be negative (because this is a cubic graph)

To find the zeros, you set the equation equal to 0 and solve for x
x^3+2x^2-8x=0
x(x^2+2x-8)=0
x(x+4)(x-2)=0
x=0   x=-4   x=2

So the zeros are at 0, -4, and 2. Therefore, you can plot the points (0,0), (-4,0) and (2,0)

And we can plug values into the original that are between each of the zeros to see which intervals are positive or negative.
Plugging in a -5 gets us -35
-1 gets us 9
1 gets us -5 
3 gets us 21

So now you know end behavior, zeroes, and signs of intervals

Hope this helps<span />
6 0
3 years ago
Read 2 more answers
A 12-sided die is rolled. The set of equally likely outcomes is {1,2,3,4,5,6,7,8,9,10,11,12). Find the probability of rolling a
levacccp [35]

Answer:

P(x>12) = 0

Step-by-step explanation:

Given

x = \{1,2,3,4,5,6,7,8,9,10,11,12\} --- outcomes

n(x) = 12 -- sample size

Required

P(x > 12)

This is calculated as:

P(x > 12) = \frac{n(x > 12)}{n(x)}

n(x>12) = 0 because none of the outcomes is greater than 12:

So:

P(x > 12) =\frac{0}{12}

P(x>12) = 0

6 0
3 years ago
Which figure is described below the locus of points in a plane equidistant between x=4 and x=6
Oksi-84 [34.3K]

Answer:

The picture is black

Step-by-step explanation:

Dbddndnddnskskskssndjd

3 0
3 years ago
If cosθ=513, what is sinθ?
Roman55 [17]
The only values a cosine can have are from -1 to 1.

6 0
3 years ago
Help with my geometry homework pleaseeee
anastassius [24]

Answer:

y=1, x=1

Step-by-step explanation:

This is a 90-45-45 triangle. One side is a sq root 2, and the other sides are a and a.

For example, if one side was 3 sq root two, then the other sides would be 3 and 3

6 0
3 years ago
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