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Novosadov [1.4K]
3 years ago
13

8 Describe the error in the work shown. 62+ 3+5 x 2 36 +8 x 2 36 + 16 52

Mathematics
1 answer:
sashaice [31]3 years ago
3 0

Answer:

75

Step-by-step explanation:

you should've done 2 times 5 first but you have done 3+5 first.

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Use the method of cylindrical shells to find the volume generated by rotating the region bounded by the given curves about the s
Furkat [3]

Answer:

\frac{16\pi}{3}.

Step-by-step explanation:

I graphed the region in the image below. The blue line is y=3, the purple line is x=1 and the green curve is y = 4x-x^{2}. The shaded region in blue is the region we are going to rotate.

Now, to find the volume  v= 2\pi \int\limits^a_b {p(x)h(x)} \, dx where a=1, b=3 (left and right points of the region), p(x) is the distance from the rotation axis to the diferential Δx, we say p(x)=x and h(x) is the height of the region, in this case is h(x)= 4x-x^{2}-3. Then,

v =  2\pi \int\limits^1_3 {x(4x-x^{2}-3)} \, dx

=  2\pi \int\limits^1_3 {4x^{2}-x^{3}-3x} \, dx

= 2\pi (\frac{4x^{3}}{3}-\frac{x^{4}}{4}-\frac{3x^{2}}{2})^{3}_1

= 2\pi (36-\frac{81}{4}-\frac{27}{2}-\frac{4}{3}+\frac{1}{4}+\frac{3}{2})

= 2\pi*\frac{8}{3}

=  \frac{16\pi}{3}.

8 0
3 years ago
a pyramid has a height of 5 in and a surface area of 90 in find the surface area of a simuler pyamied with a height fo 10
egoroff_w [7]
I think the answer would be 180

5*2=10 90*2=180
7 0
4 years ago
Help please <br> Show work if you can
grin007 [14]

Answer:

answer is 350 square cm sry can't give explanation

Step-by-step explanation:

8 0
3 years ago
Pls help WILL PICK BRAINLIEST!
Romashka-Z-Leto [24]

Answer:

D. (-14)+(-8)

Step-by-step explanation

Adding to negatives is the same as subtracting 2 positives

-14- 8= 22

-14+(-8)= 22

7 0
3 years ago
A worker's earnings, E, are a function of the number of hours, H, at a rate of $8hr
Rus_ich [418]

Answer:

hey would have to work 48 hours

Step-by-step explanation:

Divide 384 by 8 and you get 48

7 0
3 years ago
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