end of semester help

The exponential model that calculates the concentration of bacteria after x weeks can be represented by the equation B(x) = 2.1 million * (3^x), the concentration after 1.6 weeks would be approximately 14.87 million bacteria per milliliter.

This equation assumes that the concentration triples each week, starting from the initial concentration of 2.1 million bacteria per milliliter.

To estimate the concentration after 1.6 weeks, we can substitute x = 1.6 into the exponential model. B(1.6) = 2.1 million * (3^1.6) ≈ 14.87 million bacteria per milliliter. Therefore, after 1.6 weeks, the estimated concentration of bacteria in the river would be approximately 14.87 million bacteria per milliliter.

The exponential model B(x) = 2.1 million * (3^x) represents the concentration of bacteria after x weeks, where the concentration triples each week. By substituting x = 1.6 into the equation, we estimate that the concentration after 1.6 weeks would be approximately 14.87 million bacteria per milliliter.

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Answer:

he is 36

Step-by-step explanation:

you divide 52 by 2 get 26 add 10 soo jack is 36 and Jill is 16

Using the Pythagoras theorem, the length of the unknown diagonal of the rhombus can be calculated

The diagonals of a rhombus are line segments  drawn between  opposite vertices of the rhombus. The properties of the diagonals of a rhombus are listed below.

The diagonals of a rhombus bisect each other at right angles.

The diagonals of a rhombus may not be  equal.

Two diagonals divide the rhombus into four congruent right triangles.

The length of the diagonals can be calculated by various methods, such as the Pythagorean theorem or  the area of ​​a rhombus.

Example 1: Find the length of the diagonal of a rhombus if the area is 54 units2, and one diagonal is 6 units.

The area of the rhombus = 54 square units; one diagonal (q) = 6 units

We will use the formula for the diagonal of rhombus, p = (2 × Area)/q, where 'p' and 'q' are the two diagonals of the rhombus. Substituting the values, p = (2 × 54)/6 = 18 units.

Answer: Therefore, the length of the unknown diagonal is 18 units.

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The probability  that a student chosen at random speaks Spanish but not French is 0.66

What is probability ?

Probability can be defined as the ratio of number of favourable outcomes and total number of outcomes.

Given ,

At a college, 20% of students speak Spanish, 6% speak French, and 4% speak both languages.

Conditional probability

let P(I) = 0.06, P ( S & I) = 0.04 and P (S) = 0.20

Finally to find P ( S  given I )

we use the theorem

P ( S given I ) = P (S & I) / P (I)

=  0.04 / 0.06

= 4/6

= 2/3 = 0.66

Hence, The probability  that a student chosen at random speaks Spanish but not French is 0.66

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The magnitude of the resultant vector is 10.29 m, and the direction of the vector is 349 degrees north of west.

The magnitude of the resultant vector can be found using the Pythagorean theorem, which states that the magnitude of a vector is the square root of the sum of the squares of its components.

To find the magnitude of the resultant vector, we can use the formula:

Magnitude = sqrt(Ax^2 + Ay^2)

Substituting the given values, we have:

Magnitude = sqrt((-5.00 m)^2 + (9.00 m)^2)

         = sqrt(25.00 m^2 + 81.00 m^2)

         = sqrt(106.00 m^2)

         = 10.29 m

Thus, the magnitude of the resultant vector is 10.29 m.

To determine the direction of the vector, we can use trigonometry. The angle can be found by taking the inverse tangent of the ratio of the vertical component (Ay) to the horizontal component (Ax). In this case:

Direction = atan(Ay / Ax)

         = atan(9.00 m / -5.00 m)

         = atan(-1.80)

         = -61.99 degrees

Since the vector is pointing in the fourth quadrant (negative x-axis and positive y-axis), we can add 360 degrees to the angle to obtain the direction in a clockwise manner from the positive x-axis:

Direction = -61.99 degrees + 360 degrees

         = 298.01 degrees

Therefore, the direction of the vector is 298.01 degrees north of west.

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Answer:

It's 84

Step-by-step explanation:

To calculate the area of a triangule you need to use this formula:

B * H / 2

So:

12 * 14 / 2 = 84

Hope this helps :)

Pls brainliest...

Answer:

life

Step-by-step explanation:

Main Answer:

Number of students in Lincoln high school is \(4w-75\)

Explanation:

Number of students in Washington high school = w

Number of students in Lincoln high school = 75 less than four times number of students in Washington high school

Therefore, number of students in Lincoln high school = \(4w-75\)

The SSS Similarity Theorem states that if three sides of one triangle are equal to three sides of another triangle, then the triangles are similar. This theorem is also known as the Side-Side-Side Similarity Theorem or the SSS Similarity Postulate.

What is the similarity theorem of triangles?

Triangles with the same shape but different sizes are said to be similar triangles. Squares with any side length and all equilateral triangles are examples of related objects. In other words, if two triangles are similar, their corresponding sides are proportionately equal and their corresponding angles are congruent. Triangle similarity is indicated here by the symbol (~).

SSS or Side-Side-Side Similarity.
If all three sides of a triangle are in proportion to the three sides of another triangle, then the two triangles are similar.
Thus, if AB/XY = BC/YZ = AC/XZ then ΔABC ~ΔXYZ.
From this result, we can conclude that-
∠A = ∠X, ∠B = ∠Y and ∠C = ∠Z
Hence, we have described the SSS similarity theorem.

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Answer:

Step-by-step explanation:

Probability of occurring at least one tail=1−641=6463

Answer:

(13.5)/4 = 3.375

step-by-step explanation

Option (c) is the correct option.

9/10 is rational and a real no. but not an integer.

What is a rational number?

A number with the form p/q, where p and q are integers and q is not equal to 0, is said to be rational.

What is an integer?

In the category of real numbers are irrational numbers, fractions, and rational numbers like positive and negative integers.

What is a real number?

Integers, which can be both negative and positive and include zero, are numbers without a decimal or fractional component.

Our objective is to find a number which is rational and a real number but not an integer.

√2 is not rational and not a real number.

-5 is rational and a real number but It is an integer.

9/10 is rational and a real number and also not an integer.

Hence, (c) is the correct option.

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The value of the expression is 274.5

Here, we want to find the value of the expression

To do this, we are going to use the order of operation

This order is called the PEDMAS

Where P stands for parentheses , E for exponent (roots and powers). D for division, M for multiplication. A for addition and S for subtraction

Now, we can see that there are three parentheses

We start with the innermost one

That is the one with multiplication and subtraction

By doing this, we have that;

Answer:

Use the Pythagorean Theorem hypotenuse^2 = 10^2 + 3^2

hypotenuse^2 = 100 + 9

Hypotenuse^2 = 109

Hypotenuse = 10.4403065089

Answer is A

Step-by-step explanation:

Answer:

let the height of second container be x

Then volume=6912

we know that volume of cuboid= lbh

so ，

24.x.16=6912

384.x=6912

x =6912divide 384

therefore x =18 that is the height of the container

Answer:

0

40 as the remainder

Step-by-step explanation:

0 0  

 5 9 ⟌ 4 0  

     - 0    

       4 0  

     -   0  

       4 0  

Answer:

yes I think 6 is a solution to the equation

Can't see the equation sorry... Don't think you can change your question you typed either

The addition of the polynomial \(x^{3}+3xy-2xy^{2} +y^{3}\) with \(2x^{3}-5x^{2} y-3xy^{2}-2y^{3}\) is  \(3x^{3}+3xy-5x^{2} y-5xy^{2}-y^{3}\).

What is a polynomial?

⇒ A polynomial is an expression consisting of indeterminates and coefficients, that involves only the operations of addition, subtraction, multiplication, and non-negative integer exponentiation of variables.

⇒ In the addition of polynomials, the like terms are added while in subtraction, the like terms are subtracted.

Calculation;

We have been given two polynomial which we have to add   \(x^{3}+3xy-2xy^{2} +y^{3}\) and \(2x^{3}-5x^{2} y-3xy^{2}-2y^{3}\)

The sign after addition or subtraction will always be of the variable having more value.

\((x^{3}+3xy-2xy^{2} +y^{3} )+(2x^{3}-5x^{2} y-3xy^{2}-2y^{3})\)

On adding like terms with each other

⇒ \((x^{3} +2x^{3})+ 3xy-5x^{2} y-(2xy^{2}+3xy^{2})+(y^{3}-2x^{3})\)

⇒ \(3x^{3}+3xy-5x^{2} y-5xy^{2}-y^{3}\)

Hence the addition of the polynomial\(x^{3}+3xy-2xy^{2} +y^{3}\) and \(2x^{3}-5x^{2} y-3xy^{2}-2y^{3}\) is \(3x^{3}+3xy-5x^{2} y-5xy^{2}-y^{3}\).

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Joule per meter second is the unit of measurement for momentum flux or power per unit area. It is commonly used in physics and engineering to quantify the rate of energy transfer or momentum flow per unit area.

Joule per meter second (J/m^2s) is not the correct unit for momentum flux or power per unit area. The correct unit for momentum flux is Newton per square meter (N/m^2), also known as Pascal (Pa), while the correct unit for power per unit area is watt per square meter (W/m^2). The joule per meter second (J/m^2s) is actually the unit for volumetric energy dissipation rate, which measures the rate at which energy is being dissipated within a fluid volume per unit volume. It is used in the study of fluid dynamics and turbulence.

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Answer: x^6+6x^4+8x^2+2

Step-by-step explanation:

Since g comes after f then you will take g's equation and plug it into the f equation so it would turn out to be if you plugged it in

(x^2+2)^3-4(x^2+2)+2 which would equal x^6+6x^4+8x^2+2

Answer:

Option B is the correct answer for your question

The total cost  of he meat with tax and tip is $ 22.42

To calculate the total cost with tax and tip, we need to follow these steps:

multiply the meal cost by the tip rate. when  the tip rate is 18%, we have:

Tip amount = $19.00 * 0.18 = $3.42

Add the meal cost, sales tax, and tip amount to get the total cost:

Total cost = Meal cost + Sales tax + Tip amount

= $19.00 + $3.42

= $ 22.42

Therefore, the total cost with tax and tip is $22.42

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The rounded whole numbers are 25 and 4. The estimated quotient is approximately 6.25.

To round the mixed numbers to the nearest whole number, we look at the fractional part and determine whether it is closer to 0 or 1.

For the first mixed number, \(24\frac{16}{17}\), the fractional part is 16/17, which is greater than 1/2.

Therefore, rounding to the nearest whole number, we get 25.

For the second mixed number, \(4\frac{8}{9}\), the fractional part is 8/9, which is less than 1/2.

Therefore, rounding to the nearest whole number, we get 4.

Now, we can estimate the quotient:

25 ÷ 4 = 6.25

So, the estimated quotient of \(24\frac{16}{17}\) ÷  \(4\frac{8}{9}\) is approximately 6.25.

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Answer:

Its 50/50 with T or B I say the answer is B

Step-by-step explanation:

Answer:

(2.19 x 4) + (0.79 x 3)

Step-by-step explanation:

ok so u hv to take 2.19 and multiply it by four. Then take 0.79 and multiply it by three.

Answer:

9.55

Step-by-step explanation:

Answer:

-x is quadrant two your question notclear

Answer: 8 times.

Step-by-step explanation:

I will answer in English:

This says:

The volume of a cube is 125cm^3

How many times the volume will increase if we duplicate the lenght of the side?

If L is the lenght of the side, we have that the volume of the cube is:

V = L^3

If we duplicate the lenght of the side, the new volume is:

V = (2*L)^3 = 8*L^3

So we can see that the volume of the new cube is 8 times the volume of the previous cube.

Now,  we can do the math, for our original cube we have:

L^3 = 125cm^3

L = 5cm

the new cube has L' = 2*L = 10cm

The volume of this cube is:

V' = L'^3 = 10cm^3 = 1000cm^3

the ratio V'/V is:

1000cm^3/125cm^3 = 8

Answer:

\(y=\frac{1}{4} +x\)

Step-by-step explanation:

use desmos graphing calculator