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3 years ago

11

You are downloading songs to your MP3 player. The ratio of pop song to rock is 5 : 4. You download 40 pop songs. how many rock s

ongs do you download?

2 answers:

Anna [14]3 years ago

8 0

The Answer is 50 I hope this help :)

nekit [7.7K]3 years ago

7 0

Answer:

Step-by-step explanation:

50

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If the sides of a triangle are in the ratio 8:4:6 and its perimeter is 72 cm, find the area of the triangle.

stepan [7]

Answer:

Step-by-step explanation:

8 : 4 : 6

8 + 4 + 6 = 18

72 ÷ 18 = 4

8 : 4 : 6 = 32 : 16 : 24

32 × 16 × $\frac{1}{2}$ = 512cm²

hope this helps!

4 0

3 years ago

Mama L [17]

Answer:

216 $\pi$

Step-by-step explanation:

Given the figure.

And the perimeter in the ratio 4: 2: 1.

Perimeter of smallest circle = $8\pi$

To find:

Area of shaded region.

Solution:

To find the area, we need to have radius first.

And radius can be calculated by the given perimeter.

Formula for Perimeter is given as:

Perimeter = $2\pi r$

$8\pi = 2\pi r\\\Rightarrow r = 4\ cm$

Radius of smallest circle = 4 cm

Ratio of perimeter is equal to the ratio of the radii.

Radius of 2nd smallest circle by the given ratio = 8 cm

Radius of largest circle = 16 cm

Area of a circle is given the formula:

$A = \pi r^2$

Area of the smallest circle = $\pi 4^2 = 16\pi\ cm^2$

Area of the 2nd smallest circle = $\pi 8^2 = 64\pi\ cm^2$

Area of the largest circle = $\pi 16^2 = 256\pi\ cm^2$

Area of the shaded region = Area of largest circle + 2 $\times$ Area of 2nd smallest circle + 3 $\times$ Area of smallest circle - 2 $\times$ Area of smallest circle - 3 $\times$ Area of 2nd smallest circle

Area of the shaded region = Area of largest circle - Area of 2nd smallest circle + Area of smallest circle = $256\pi - 64\pi +16\pi = 216\pi$

6 0

2 years ago

Maggie took her dad out to lunch for his birthday. Their lunch cost $23, and the local sales tax is 9%. If Maggie left a 20% tip

kicyunya [14]

Answer:

29.67

Step-by-step explanation:

Here's the explanation if you need it,

First, miltiply 9% by 23 thats your tax

next, multiply 20% and 23

Then take all the values you got and add them all togeather hope that helps!

3 0

3 years ago

Read 2 more answers

Match each quadratic equation with its solution set

Sever21 [200]

Hello,
Please, see the attached files.
Thanks.

4 0

3 years ago

A Find the slope of the line that passes through the points A (6,2) and

Gemiola [76]

Answer:

-3

Step-by-step explanation:

Slope is rise over run or the change in y over the change in x

the answer is -3 over 1

3 0

3 years ago