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Katen [24]
1 year ago
7

Rewrite the following integral using the order of integration dydxdz​

Mathematics
1 answer:
Vlad [161]1 year ago
7 0

y is bounded between the plane y=z and the parabolic cylinder y=1-x^2. The other variables are bounded by constants, -1\le x\le1 and 0\le z\le1, so the integral is

\displaystyle \int_0^1 \int_{-1}^1 \int_z^{1-x^2} dy \, dx \, dz

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A chemist has 200 mL of a 10% sucrose solution. She adds x mL of a 40% sucrose solution. The percent concentration, y, of the fi
user100 [1]

Answer:

The chemist needs to add 400mL of 40% solution.

Step-by-step explanation:

The equation

y=\frac{0.1(200)+0.4x}{200+x} *100

gives the percent concentration y of the final mixture, when x mL of the 40% solution are added.

Now we are asked, how many milliliters x of the 40% solution should the chemist add to get final percent concentration y=30; this is just a matter of solving the equation

30=\frac{0.1(200)+0.4x}{200+x} *100

and we solve it the following way:

30=\frac{0.1(200)+0.4x}{200+x} *100\\\\0.3 =\frac{0.1(200)+0.4x}{200+x}\\\\0.3(200+x)=0.1(200)+0.4x\\\\60+0.3x=20+0.4x\\\\40=0.1x\\\\x=\frac{40}{0.1} \\\\\boxed{x=400\:mL}

Thus, the chemist needs 400mL of 40% solution to get 30% concentration of the final mixture.

7 0
4 years ago
How many phone numbers are there that do not contain the number 8?
devlian [24]

Answer:

Thousands, probably millions

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Enter a positive common factor (other than 1) of the fraction's numerator and
Artyom0805 [142]

Answer:

7

Step-by-step explanation:

7 is a common positive factor if 14 and 21. 2:3

5 0
3 years ago
Kevin is a quarterback on the football team.he completed 36 passes during the season.his second-string replacement,Mark complete
anastassius [24]
36 × \frac{2}{9}

Since 9 is a factor of 36 you can reduce the 36 to 4 and the 9 to one 

Then just multiply what is left

4 <span>× 2 = 8

So, Mark completed 8 passes.</span>
3 0
3 years ago
Which trinomial is a perfect square trinomial? a2 – 18a + 36 a2 – 16a + 64 a2 – 8a + 64 a2 – 6a + 36
Komok [63]

Answer:

a^2-16a+64

Step-by-step explanation:

we have the options

a^2-18a+36\\a^2-16a+64\\a^2-8a+64\\a^2-6a+36

the one that is a perfect equare tinomial is:

a^2-16a+64

because we can rewrite this as follows:

(a-8)^2  this is because we know that

x^2-2xy+y^2=(x-y)^2

thus

a^2-16a+64=(x-8)^2

and the other options cannot be represented as a perfect square trinomial, so the correct answer is:

a^2-16a+64

4 0
3 years ago
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