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jasenka [17]
3 years ago
11

Please help, i’m not sure if i’m correct

Mathematics
1 answer:
hammer [34]3 years ago
7 0

Answer:

Looks good to me! :)

Step-by-step explanation: Hope you have a great rest of your day!

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The base of a solid in the region bounded by the graphs of y=e^-xy=0, and x=0, and x=1. cross sections of the solid perpendicula
svlad2 [7]

The diameter of each semicircular cross-section is given by the vertical distance between the curves y=e^{-x} and y=0, which is just e^{-x}.

Given a semicircle with diameter d, its area is \dfrac{\pi d^2}8, so the area of each semicircular section is \dfrac{\pi e^{-2x}}8.

The volume of the solid is obtained by integrating from 0 to 1:

\displaystyle\frac\pi8\int_{x=0}^{x=1}e^{-2x}\,\mathrm dx=\frac{(e^2-1)\pi}{16e^2}

6 0
3 years ago
Suppose that 4% of all adults suffer from diabetes and that 31% of all adults are obese. Suppose also that 2% of all adults both
den301095 [7]

Answer:

I don't see a question. if you comment it on this answer I can try to help

7 0
3 years ago
3 3/4 ÷ (1 2/3 + 2 1/2)​
ZanzabumX [31]

Answer:

9/10.

Step-by-step explanation:

3 3/4 ÷ (1 2/3 + 2 1/2)​

= 3 3/4 / ( 5/3 + 5/2)

= 3 3/4 / ( 10/6 + 15/6)

= 3 3/4 / 25/6

= 15/ 4 / 25/6

= 15/4 * 6/25

= 90/100

= 9/10.

4 0
2 years ago
What is his average speed for end the entire trip 280 miles<br> ?
-BARSIC- [3]

Answer:

20mph

Step-by-step explanation:

because when you divide the 280 it goes by 20 mph to get to 280 miles by quarters but in 20s

7 0
2 years ago
Machine A makes 12.75 ounces of popcorn in 3 minutes. Machine B makes 18 ounces of popcorn in 4 minutes. If each machine makes p
melamori03 [73]

Answer: Machine A makes popcorn at a rate of 4.25 ozs per minute (12.75oz/3min).

Machine B makes popcorn at a rate of 4.5 ozs per minute (18oz/4min).

Machine A will make 4.25oz/min * 10minutes = 42.5oz of popcorn after 10 minutes

Machine B will make 4.5oz/min * 10 minutes = 45oz of popcorn after 10 minutes

After 10 minutes there will be a total of 42.5oz (Machine A) +45oz (Machine B) = 87.5oz.

So the answer is: Yes there will be (more than) enough popcorn if both machines make popcorn for 10 minutes.

If the question is wondering how many 9oz bags they can fill: 87.5oz/9oz per bag = 9.7222 bags. The machines can fill 9, 9oz, bags with some popcorn leftover.

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
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