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liubo4ka [24]
3 years ago
9

A Web music store offers two versions of a popular song. The size of the standard version is 2.3 megabytes (MB). The size of the

high-quality version is 4.2 MB. Yesterday, there were 990 downloads of the song, for a total download size of 3427 MB. How many downloads of the standard version were there?
Mathematics
1 answer:
Tju [1.3M]3 years ago
8 0

Step-by-step explanation:

If there was 3427 MB, the lower quality would've gotten 1,490 sales alone.

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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:

The area of a disk of revolution at any x about the x- axis is πy² where y=2x. If we integrate this area on the given range of values of x from x=0 to x=1 , we will get the volume of revolution about the x-axis, which here equals,

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Now we have to calculate the volume of revolution about the y-axis. For that we have to first see by drawing the diagram that the area of the CD like disk centered about the y-axis for any y, as we rotate the triangular area given in the question would be pi - pi*x². if we integrate this area over the range of value of y that is from y=0 to y=2 , we will obtain the volume of revolution about the y-axis, which is given by,

\int\limits^2_0 {pi - pix^{2} } \, dy = \int\limits^2_0 {1 - y^{2}/4 } \, dy

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Answer:X=30 so A=65

Step-by-step explanation:

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