Please answer this please

Given :

A solid object is dropped into a pond with a temperature of 20 degrees Celsius.

The function f(t) = Ce(-kt) + 20 represents the situation where t is time in minutes, C is a constant and k = 0.0399.

To Find :

The initial temperature of the object.

Solution :

Putting t = 4 in given equation, we get :

[tex]35 = Ce^{(-0.0399)\times 4)}+20\\\\15 = Ce^{-0.16}\\\\C = 15\times e^{0.16}\\\\C = 17.60[/tex]

Putting value of C in given equation, we get :

[tex]f(t) = 17.60e^{-0.0399t} + 20[/tex]

Now, for initial temperature is given at t=0 s .

[tex]f(t) = 17.60e^{-0.0399\times 0} + 20\\\\f(t) = 37.60^o\ C[/tex]

Therefore, the initial temperature of the object is 37.60° C.

Hence, this is the required solution.

Answer:

fhrecvregvrsgrrfdrerdggbrsdvrg

Step-by-step explanation:

Just do 175 divided by 20

Answer:

7.5

Step-by-step explanation:

Ronnie charges $25 plus $20 per hour. This means that he made the following depending on how many hours he spent on it:

Hours        Dollars

0                 25 = 25 + 0(20)=25

1                  25+20 = 25 + 1(20)=45

2                  25+20+20 = 25 +2 (20)=65

3                  25+20+20+20 = 25 +3 (20)=85

4                  25+20+20+20+20 = 25 +4 (20)=105

5                  25+20+20+20+20+20 = 25 +5 (20)=125

n                  25+n(20)=175

To find how many hours he worked for $175 we solve the equation using inverse operations:

25+n(20)=175

25-25+n(20)=175-25

n(20)=150

n= 7.5 hours

Answer:

a and d on edge

Step-by-step explanation:

Answer:

a and d

Step-by-step explanation:

Answer:

maybe a. (b-c)=ab-ac (but im not sure)

Answer:

0.1%

Step-by-step explanation:

0.1%

Answer:

No solution.

Step-by-step explanation:

Then the equation has no solution.

For example

2x - 2 = 2x + 1

-2x - 2x

-2 = 1.

___________________________________________

Brainliest?

None of the above i believe. Maybe A.

Answer:

It will take 3 more hours for pool to be full

Answer: hahah I’m doing this for points lol

Step-by-step explanation:

Answer:

The correct answer is $300

Step-by-step explanation:

According to the given scenario, the computation of the interest produced is shown below;

Given that

The investment of $4,250 produced $125 return

So for $10,200 the return would be

= (Production × return) ÷ (investment made)

= ($10,200 × $125)  ÷ ($4,250)

= $300

Hence, the interest produced is $300

Answer:

5

Step-by-step explanation:

multiply

8x - 12 = 28

add 12 to both sides

8x = 40

divide

5

Answer:

Start with what we know:

4(2x-3) = 28

Now we do rainbow property aka distributive property:

4*2x=8x

4*-3=-12

now we have:

8x - 12 = 28

we have to get 8x alone:

we will add 12 to both sides:

8x= 40

now we have to get x alone:

8x/8=x

40/8=5

now we put that into a equation:

x=5

Answer:

[tex]\mathrm{The\:solutions\:to\:the\:system\:of\:equations\:are:}[/tex]

[tex]y=-\frac{12}{5},\:x=\frac{1}{5}[/tex]

Step-by-step explanation:

Given the equations

[tex]y=-32x+4;\:y=23x-7[/tex]

solving the system of the equations

[tex]\begin{bmatrix}y=-32x+4\\ y=23x-7\end{bmatrix}[/tex]

Arrange equation variables for elimination

[tex]\begin{bmatrix}y+32x=4\\ y-23x=-7\end{bmatrix}[/tex]

[tex]y-23x=-7[/tex]

[tex]-[/tex]

[tex]\underline{y+32x=4}[/tex]

[tex]-55x=-11[/tex]

[tex]\begin{bmatrix}y+32x=4\\ -55x=-11\end{bmatrix}[/tex]

[tex]-55x=-11[/tex]

[tex]\frac{-55x}{-55}=\frac{-11}{-55}[/tex]

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

[tex]\mathrm{For\:}y+32x=4\mathrm{\:plug\:in\:}x=\frac{1}{5}[/tex]

[tex]y+32\cdot \frac{1}{5}=4[/tex]

[tex]\mathrm{Subtract\:}32\frac{1}{5}\mathrm{\:from\:both\:sides}[/tex]

[tex]y+32\cdot \frac{1}{5}-32\cdot \frac{1}{5}=4-32\cdot \frac{1}{5}[/tex]

[tex]y=-\frac{12}{5}[/tex]

[tex]\mathrm{The\:solutions\:to\:the\:system\:of\:equations\:are:}[/tex]

[tex]y=-\frac{12}{5},\:x=\frac{1}{5}[/tex]

Answer:

A

Step-by-step explanation:

Answer:

[tex] \boxed{ - \frac{ - 4}{ - h} }[/tex]

Answer: it is 9 m

Step-by-step explanation:

I just got it correct on edge have a great day

Answer:

answer is this =8y-2v-8x

Step-by-step explanation:

Answer:

8y - 2v - 8x

Step-by-step explanation:

-2(-3y + v) + 2(-4x + y)

~Distribute

6y - 2v - 8x + 2y

~Combine like terms

8y - 2v - 8x

Best of Luck!

Answer:

Option (C)

Step-by-step explanation:

Domain of a function is a set of x-values (input values) of the function.

Similarly, Range of a function is a set of y-values (output values).

Given set of ordered pairs is {(-2, -1), (2, 1), (1, 5), (-2, 4)}.

Domain → {-2, 2, 1, -2}

Range → {-1, 1, 4, 5}

Option C will be the correct option.

Answer:

The answer to your question is #2 <MHL and <JHK

Step-by-step explanation:

Answer:

(2, 3)

Step-by-step explanation:

lines with undefined slopes are vertical lines

Answer:

The correct options are;

The tendency of electrons to complete the 2p orbital gives the element a higher degree of electronegativity

Step-by-step explanation:

The electronegativity of an element increases as electrons are added to the valence shell of the element

The electronegativity of elements increases up the group and across the period, therefore, an element having fewer number of shells is more electronegative than one with more shells

Which gives an element with the 2p orbital filled with electrons is more electronegative than one with the 3p orbital filled with electrons.

Answer:

I think the answer is c. Hope this helps. Please tell me if I am right or wrong.

Step-by-step explanation:

Answer:

i would say the 3rd answer

Answer:

Find 50% of 3000

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

The exterior angle is the sum of the two given angles. (The are called the remote interior angles. The are not connected to the exterior angle we are supposed to find.)

exterior angle = 44 + 39

exterior angle = 83

Answer:

C

Step-by-step explanation:

OK.  All the work is in the attached drawing.

Please spend enough time with it to understand what was done and how, so that you can do the next problem like this one completely on your own.

Good luck !

==============================

Here's a picky pickypoint to think about concerning the "cost".  I'm not quite sure what to do about this:

The initial, one-time $55 is a "deposit".  If she doesn't smash the bike or steal it, she gets the $55 back when she returns the bike.  

So if she eventually gets the $55 back, is it a cost ? ?  I don't know how to think about it.

She does need to give them the $55 at the beginning, just to take the bike out.  So she has to have it with her and give it to them temporarily, even though she'll  get it back, and she'll still have it when she returns home.

So here's the story:  

-- While she HAS the bike, the graph correctly shows all the money she needs, in order to get the bike, and keep it for however long she keeps it.

-- Finally, at the end of the week, after she returns the bike and gets her $55 back, the line and everything on the graph will shift down by $55.  The line will start at zero, and the little red ordered pairs will also shift straight down and still be on the line.

To put it one more way:

-- While Jen has the bike, the y-intercept of the graph is $55.

-- After she returns the bike in good condition, the y-intercept is zero.

5.6609465e+56

What the...

Answer:

y=3/2

Step-by-step explanation:

This line's slope is perpendicular to -2/3 and its y intercept is 0.

Answer:

  y intercept (0, 4)

  x intercept (4, 0)

I hope this is good enough: