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3 years ago

Please someone explain to me how did we multiply the denominator in this

Mathematics

1 answer:

AleksandrR [38]3 years ago

8 0

ok so what you wanna do is use multiplication

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Use the formula C-2ar to find the radius, r, for a circle with a circumference of 125 centimeters. Round your answer to the

julsineya [31]

Option A

The radius of circle is 19.90 cm

<h3>Solution:</h3>

The formula for circumference of circle is given as:

$C = 2 \pi r$

Where,

"C" is the circumference of circle

"r" is the radius of circle

$\pi$ is a constant equal to 3.14

Given that, circumference = 125 cm

To find: Radius of circle

Substitute the given value of "C" = 125 in formula

$125 = 2 \times 3.14 \times r\\\\125 = 6.28 \times r\\\\r = \frac{125}{6.28}\\\\r = 19.90$

Thus radius of circle is 19.90 cm

3 0

3 years ago

Which of the following expressions represents "twelve diminished by six times a number"?

ahrayia [7]

Diminished means "made smaller", so in other words, subtracted. This makes the phrase "twelve subtracted by six times a number", or more simply "twelve minus six times a number".

Answer:
A. 12 - 6n

4 0

3 years ago

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The scale on a map reads 3⁄4 inches = 60 miles. If two cities are 2 1⁄2 inches apart on the map, find the actual distance betwee

const2013 [10]

200 miles. 2.5 divided by 3/4 is 3.33333-, multiplying the given by 60 would give us 199.98, which you can round to 200.

8 0

3 years ago

8 - 2 3/5 ANSWER ASAPPPPPP TO BE BRAINLISET AND EXPLAIN HOW AND BE RIGHT

kompoz [17]

Answer:

5 2/5

Step-by-step explanation:

sorry, I know the answer, but don't know how to explain in words

3 0

3 years ago

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Find the uncertainty in a calculated average speed from the measurements of distance and time. Average speed depends on distance

zzz [600]

Answer:

$\frac{\Delta v}{v}=0.426$

Step-by-step explanation:

you have that the average sped is given by the following formula:

$v(x,t)=\frac{x}{t}$

The uncertainty formula for a division is given by:

$\frac{\Delta v}{v}=\sqrt{(\frac{\Delta x}{x})^2+(\frac{\Delta t}{t})^2}$ (1)

Δv: uncertainty in speed

Δx: uncertainty in the distance = 0.9m

Δt: uncertainty in time = 0.7s

x: distance = 8.1m

t: time = 1.7s

You replace the values of all parameters in the equation (1):

$\frac{\Delta v}{v}=\sqrt{(\frac{0.9}{8.1})^2+(\frac{0.7}{1.7})^2}\\\\\frac{\Delta v}{v}=0.426$

Hence, the relation between the uncertainty in the average velocity is 0.426

4 0

3 years ago