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2 years ago

Find the circumference. Use 3.14 for the value of pi. Round your answer to the nearest tenth.

Mathematics

2 answers:

Butoxors [25]2 years ago

7 0

Answer:

50.24 km

Step-by-step explanation:

first multiply 8 by 2 to get 16 km and lastly multiply by pi (3.14) to get 50.24 km

diamong [38]2 years ago

6 0

Answer:

c= 50.24

Step-by-step explanation:

C=2pi R

C=2mutiply 3.14 mutiply R

c= 6.28R

C= 50.24

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3 years ago

A circle has a radius of 5 in. A central angle that measures 150° cuts off an arc.

Slav-nsk [51]

Answer:

Part 1) The exact value of the arc length is $\frac{25}{6}\pi \ in$

Part 2) The approximate value of the arc length is $13.1\ in$

Step-by-step explanation:

step 1

Find the circumference of the circle

The circumference of a circle is equal to

$C=2\pi r$

we have

$r=5\ in$

substitute

$C=2\pi (5)$

$C=10\pi\ in$

step 2

Find the exact value of the arc length by a central angle of 150 degrees

Remember that the circumference of a circle subtends a central angle of 360 degrees

by proportion

$\frac{10\pi}{360} =\frac{x}{150}\\ \\x=10\pi *150/360\\ \\x=\frac{25}{6}\pi \ in$

step 3

Find the approximate value of the arc length

To find the approximate value, assume

$\pi =3.14$

substitute

$\frac{25}{6}(3.14)=13.1\ in$

7 0

3 years ago

Why does a siren have a higher pitch as it approaches you?

Airida [17]

Answer:

Apparent Increase in Wave Frequency

As the ambulance approaches you, the distance between the source of the waves and the observer decreases. Consequently, the siren sounds more shrill as the pitch of the wailing siren 'sounds' higher than its original value, as sound waves reach you 'more frequently'.

Step-by-step explanation

hope this helps

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3 years ago

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3 years ago

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Step-by-step explanation:

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