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kupik [55]
3 years ago
11

Help me please! If you DO decide to help, please explain it to me since I'm extremely confused! THANK YOU!

Mathematics
2 answers:
den301095 [7]3 years ago
8 0

\bf \cfrac{(-4x^2)(2x^{-2}y)^3}{(16x^5)(4y^3)^2}\implies \cfrac{(-4x^2)(2^3x^{-2\cdot 3}y^3)}{(16x^5)(4^2y^{3\cdot 2})}\implies \cfrac{(-4x^2)(8x^{-6}y^3)}{(16x^5)(16y^6)} \\\\\\ \cfrac{-32x^{2-6}y^3}{256x^5y^6}\implies -\cfrac{x^{-4} y^3}{8x^5y^6}\implies -\cfrac{1}{8x^5x^{4}y^6y^{-3}}\implies -\cfrac{1}{8x^{5+4}y^{6-3}} \\\\\\ -\cfrac{1}{8x^9y^3}

butalik [34]3 years ago
6 0

So firstly, you want to get rid of the outermost powers. The rule with powering something with an exponent is to multiply the exponents together.


In this case: (2x^{-2}y)^3=(2^{1*3}x^{-2*3}y^{1*3})=(8x^{-6}y^3) and (4y^3)^2=(4^{1*2}y^{3*2})=(16y^6)


Our current equation look like this: \frac{(-4x^2)(8x^{-6}y^3)}{(16x^5)(16y^6)}


Next, you want to multiply what's on the numerators and the denominator. The rule with multiplying exponents of the same base is to add them together.


In this case: \frac{(-4x^2)(8x^{-6}y^3)}{(16x^5)(16y^6)}=\frac{-32x^{2+(-6)}y^3}{256x^5y^6} =\frac{-32x^{-4}y^3}{256x^5y^6}



Now we can divide. The rule with dividing exponents with the same base is that you subtract them.


In this case: \frac{-32x^{-4}y^3}{256x^5y^6}=-\frac{1}{8} x^{-4-5}y^{3-6}=-\frac{1}{8} x^{-9}y^{-3}


Now, if you're required to leave no negative exponents, the rule is that for example x^-2 would turn into 1/x^2. In this case, it would turn like this: -\frac{1}{8x^9y^3} . And that would be your final answer.

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liq [111]

Answer:

Workdone = 3200 lb.ft

Step-by-step explanation:

We are told that the bucket is filled with 40 lb of water but water leaks out of a hole in the bucket at a rate of 0.2lb/s

Thus,

Weight of water at any given time (t) would be;

w(t) = 40 - 0.2t - - - - (1)

We are told the bucket is pulled up at a rate of 2ft/s.

Thus, height at time (t); y = 0 + 2t = 2t

Since y = 2t,

Then,t = y/2

Put y/2 for t in eq 1

Thus; w(y) = 40 - 0.2(y/2)

w(y) = 40 - 0.1y

Now, at y = 80 ft, we have;

w(80) = 40 - 0.1(80)

w(80) = 40 - 8 = 32 lb

Since 32 lbs are left, it means there is always water in the bucket.

Thus, work done is;

W = 80,0[∫(Total weight).dy]

W = 80,0[∫[(weight of rope) + (weight of bucket) + (weight of water)]dy]

W = 80,0[∫[0 + 4 + 40 - 0.1y]dy]

Integrating, we have;

W = [44y - y²/20] at boundary of 80 and 0

So,

W = [44(80) - 80²/20] - [0 - 0²/20]

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Harlamova29_29 [7]
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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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