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larisa86 [58]
3 years ago
15

t takes Dariya 35 seconds to download 5 songs from the Internet. How can the number of seconds it would take Dariya to download

7 songs at this rate be determined?
Mathematics
3 answers:
Vitek1552 [10]3 years ago
8 0
She would be able to download 49 at this rate.
Because 5/35 =7/n which would then =245/5 which equals 49
Ahat [919]3 years ago
6 0

Answer:

The time it takes to download 7 songs is 49 seconds.

Step-by-step explanation:

It is about a division problem.

The first step is to determine how long it takes to download just one song. You must divide the total seconds by the total songs downloaded. The result would be the time required to download just one song.

\frac{35\, seconds}{5\, songs}=7\frac{seconds}{song}

The previous value indicates that the download time is 7 seconds per song.

The second step is to determine how long it takes to download 7 songs. With the previous value in mind, you must multiply the time it takes to download one song by the 7 songs that Dariya wants to download, to obtain the total time it takes to download the 7 songs.

\frac{7\, seconds}{1\, song}\times 7\, songs=49\, seconds

Thus, the time it takes to download 7 songs is 49 seconds.

rreunna2 years ago
0 0

42 seconds

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5 0
3 years ago
Read 2 more answers
Find the distance between the given points: (2, -2) and (-4, 7)
sasho [114]

Answer:

3\sqrt{13}

Step-by-step explanation:

Hi there!

We want to find the distance between the points (2, -2) and (-4, 7).

To do that, we can use the distance formula.

The distance formula is given as \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}, where (x_1, y_1) and (x_2, y_2) are points

We have everything needed to find the distance, but let's label the values of the points to avoid any confusion

x_1=2\\y_1=-2\\x_2=-4\\y_2=7

Now substitute those values into the formula and solve

\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

\sqrt{(-4-2)^2+(7--2)^2}

Simplify

\sqrt{(-4-2)^2+(7+2)^2}

\sqrt{(-6)^2+(9)^2}

Square the numbers under the radical

\sqrt{36+81}

Add the numbers under the radical together

\sqrt{117}

Simplify the square root

3\sqrt{13}

Hope this helps!

6 0
3 years ago
In testing the lethal concentration of a chemical found in polluted water. it is found that a certain concentration will kill 20
sasho [114]

Answer:

a) 0.1091

b) 0.9994

c) 0.5886

Step-by-step explanation:

X = the number of fish out of 20 that die after 24 hours

x = 0, 1, 2, . . . , 20

X~ Binomial (n= 20, p =0.20)

P(14 survive) = P(X = 6)

= nC_r p^r q^{n-r}= 20C_6 0.2^6\times0.8^{14}=0.1091

Similarly we can find out

P(at least 10 survive) = P( X <= 10 ) = (Using technology) = 0.9994

P(at most 16 will survive) = P(X <= 16) = (Using technology) = 0.5886

7 0
3 years ago
How many 8's are in the answer and sum 5890/45?
Novay_Z [31]

Answer:

  • <em><u>1. There are infinite 8's</u></em>
  • <em><u>2. The estimate is 130.89</u></em>
  • <em><u>3. The difference is 0.01</u></em>

<em><u /></em>

Explanation:

There are countless, or infinite, 8's in the answer because the result is a periodic decimal:

        \dfrac{5890}{45}=130.8888 . . .

The notation used for the periodic decimal numbers is an arc over the number that is repeated. In this case, it would be an arc over the first 8.

I will use a bar just to show how it is, but instead of a bar it should be an arc:

          \dfrac{5890}{45}=130.\overline 8

The <em>estimation</em> or approximation to <em>two decimal places</em> requires to drop the 8's since the third one and increase the second 8 to 9 (because the first decimal dropped is greater than or equal to 5).

Thus the estimated value would be 13.89.

The difference is:

  • 130.89 - 130.888. . . = 0.0111. . .
  • Rounded to 2 decimal places: 0.01

3 0
3 years ago
Evaluate -23 + 11 x 4.
zysi [14]

-23+11x4

-23+44

21

the answer is 21

5 0
1 year ago
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