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4 years ago

The circumference of the wheel on Beyonce's bicycle is 63 inches. What is the diameter of the bicycle wheel to the nearest inch?

Mathematics

1 answer:

svetoff [14.1K]4 years ago

3 0

Answer:

Step-by-step explanation:

To find the diameter of a circle (that you know the circumference of), you use a formula.

The formula is: C=πd

variables:

C = circumference

d = diameter

You do not know the diameter, so this is the variable that you are solving for.

You DO know the circumference, so you can replace this variable with its number value as shown:

63=πd

The simplified version of this equation is:

d=63/π

the decimal form is:

20.05352282

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A bag contains only pink , black and yellow marbles the ratio is 8:7 the ratio of black to yellow is 1:5

igor_vitrenko [27]

The percent of black is 14% if the bag contains only pink, black and yellow marbles the ratio is 8:7 the ratio of black to yellow is 1:5

<h3>What is the ratio?</h3>

It is defined as the comparison between two quantities that how many times the one number acquires the other number. The ratio can be presented in the fraction form or the sign : between the numbers.

We have:

Pink to black = 8:7

Black to yellow = 1:5

Let's suppose the pink is 8x

Black = 7x

Yellow = 7(5x) = 35x

Percent of black = 7x(100)/(8x+7x+35x)

Percent of black = 14%

Thus, the percent of black is 14% if the bag contains only pink, black and yellow marbles the ratio is 8:7 the ratio of black to yellow is 1:5

Learn more about the ratio here:

brainly.com/question/13419413

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3 years ago

Which value makes the equation 3x - 6 = 36 true?

steposvetlana [31]

Answer:

C) 14

Step-by-step explanation:

3x-6=36

3x=36+6

3x=42

x=42/3

x=14

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3 years ago

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Answer:

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If a 100 m. diameter wind turbine is exposed to 7 m/s wind with an air density of 1.25 kg/m what is the electricity produced by

Yuliya22 [10]

Answer:

electric energy = 980 J

Step-by-step explanation:

Given,

Diameter of wind turbine = 100 m

Speed of wind,v = 7 m/s

Density of air = 1.25 kg/m

Hence, the total mass of air enters into turbine =Speed of wind x Diameter of wind turbine

= 1.25 x 100

= 125 kg

Hence, total mechanical energy of turbine can be given by,

$E\ =\ \dfrac{1}{2}.m.v^2$

$=\ \dfrac{1}{2}\times 125\times 7^2$

= 3062.5 J

Efficiency of turbine = 32%

Hence,

total electric energy = 32% of mechanical energy

$=\dfrac{32}{100}\times 3062.5\ J$

= 980 J

So, the total electric energy produced by the turbine will be 980 J.

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