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Scorpion4ik [409]
3 years ago
11

Heather is a cashier and she can ring up 36 customers in 24 minutes. At this rate how many minutes does it take to ring up 6 cos

tumers ?
Mathematics
2 answers:
Jet001 [13]3 years ago
3 0

Answer: 4

Step-by-step explanation:

Let's make a table.

So we know that for 24 minutes, Heather can ring up 36 customers. Now, to get 6 customers, you need to divide 36 by 6.

So

36 = 24

/ 6    /6

_______

6 = <u>4</u>

qwelly [4]3 years ago
3 0

Answer:

4 minutes

Step-by-step explanation:

36 and 24 are both factors of 6.

So since you have 6 costumers you divide 36 by 6 to get the 6 costumers.

Then you do the same thing with 24. 24 divided by 6 = 4. (Your answer.)

Hope this helps! <3

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Dy/dx if y = Ln (2x3 + 3x).
NeTakaya

Answer:

\frac{6x^2+3}{2x^3+3x}

Step-by-step explanation:

You need to apply the chain rule here.

There are few other requirements:

You will need to know how to differentiate \ln(u).

You will need to know how to differentiate polynomials as well.

So here are some rules we will be applying:

Assume u=u(x) \text{ and } v=v(x)

\frac{d}{dx}\ln(u)=\frac{1}{u} \cdot \frac{du}{dx}

\text{ power rule } \frac{d}{dx}x^n=nx^{n-1}

\text{ constant multiply rule } \frac{d}{dx}c\cdot u=c \cdot \frac{du}{dx}

\text{ sum/difference rule } \frac{d}{dx}(u \pm v)=\frac{du}{dx} \pm \frac{dv}{dx}

Those appear to be really all we need.

Let's do it:

\frac{d}{dx}\ln(2x^3+3x)=\frac{1}{2x^3+3x} \cdot \frac{d}{dx}(2x^3+3x)

\frac{d}{dx}(\ln(2x^3+3x)=\frac{1}{2x^3+3x} \cdot (\frac{d}{dx}(2x^3)+\frac{d}{dx}(3x))

\frac{d}{dx}(\ln(2x^3+3x)=\frac{1}{2x^3+3x} \cdot (2 \cdot \frac{dx^3}{dx}+3 \cdot \frac{dx}{dx})

\frac{d}{dx}(\ln(2x^3+3x)=\frac{1}{2x^3+3x} \cdot (2 \cdot 3x^2+3(1))

\frac{d}{dx}(\ln(2x^3+3x)=\frac{1}{2x^3+3x} \cdot (6x^2+3)

\frac{d}{dx}(\ln(2x^3+3x)=\frac{6x^2+3}{2x^3+3x}

I tried to be very clear of how I used the rules I mentioned but all you have to do for derivative of natural log is derivative of inside over the inside.

Your answer is \frac{dy}{dx}=\frac{(2x^3+3x)'}{2x^3+3x}=\frac{6x^2+3}{2x^3+3x}.

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3 years ago
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