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2 years ago

10

Suppose the diameter of a circle is 16. what is its circumference?

2 answers:

dolphi86 [110]2 years ago

8 0

The circumference of the circle formula is 2πr or πd.

We will use πd since we know the diameter.

C = πd
C = (3.14)(16)
C = 50.24

Hope this helps :)

Elan Coil [88]2 years ago

7 0

Answer: 16π

Step-by-step explanation: To find the circumference of a circle with a diameter of 16, start with the formula for the circumference,

Circumference = 2πr

Notice that we are given the diameter instead of the radius. The radius is equal to half of the diameter. So here, the radius will be equal to half of 16 or 8.

So we can plug in 8 for r in the formula.

Circumference = (2) (π) (8)

Circumference = 16π

Therefore, the circumference of a circle with a diameter of 16 is 16π.

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3 years ago

Write a x (-a)x 13 x a x (-a) x 13 in power notation

miss Akunina [59]

Answer:

$a\times (-a)\times 13\times a\times (-a)\times 13$ can be written in power notation as $a^{4}\times 13^{2}$

Step-by-step explanation:

The given expression

$a\times (-a)\times 13\times a\times (-a)\times 13$

Writing a\times (-a)\times 13\times a\times (-a)\times 13 in power notation:

Let

$a\times (-a)\times 13\times a\times (-a)\times 13$

= $[13\times13][(a\times (-a)\times a\times (-a)]$

As

$13\times13 = 13^{2}$ , $a\times a = a^{2}$ , $(-a)\times (-a) = (-a)^{2}$

So,

$=[13^{2}][a^2\times (-a)^2]$

As

$(-a)^2 = a^{2}$

So,

$=[13^{2}][a^2\times a^2]$

As ∵ $a^{m} \times a^{n}=a^{m+n}$

$=[13^{2}][a^{2+2}]$

As ∵ $a^{m} \times a^{n}=a^{m+n}$

$=13^{2}\times a^{4}$

$=a^{4}\times 13^{2}$

Therefore, $a\times (-a)\times 13\times a\times (-a)\times 13$ can be written in power notation as $a^{4}\times 13^{2}$

<em>Keywords: power notation</em>

<em>Learn more about power notation from brainly.com/question/2147364</em>

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3 years ago

Read 2 more answers

A string is cut into two pieces in the ratio 2 : 7. The difference between the lengths of the two pieces is 90cm. Find the lengt

Nataly_w [17]

Answer:the length of the shorter string= 36cm

Step-by-step explanation:

Let us assume the lengths are 2x and 7x since thery are in the ratio of 2 :7

Such that Length of the shorter string = 2x

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3 years ago

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