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Luda [366]
3 years ago
15

What is the area of the large circle?

Mathematics
1 answer:
OLEGan [10]3 years ago
7 0

Answer:

7.07

Step-by-step explanation:

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Logan bought 30 balloons. 4/6 of the balloons are purple.<br> How many of the balloons are purple?
Georgia [21]

Answer:

20 are purple.

Step-by-step explanation:

4/6 * 30

= 120/6

= 20.

6 0
3 years ago
(7 + 7i)(2 − 2i)
Ostrovityanka [42]

The complex number  -7i into trigonometric form is 7 (cos (90) + sin (90) i) and  3 + 3i in trigonometric form is 4.2426 (cos (45) + sin (45) i)

<h3>What is a complex number?</h3>

It is defined as the number which can be written as x+iy where x is the real number or real part of the complex number and y is the imaginary part of the complex number and i is the iota which is nothing but a square root of -1.

We have a complex number shown in the picture:

-7i(3 + 3i)

= -7i

In trigonometric form:

z = 7 (cos (90) + sin (90) i)

= 3 + 3i

z = 4.2426 (cos (45) + sin (45) i)

\rm 7\:\left(cos\:\left(90\right)\:+\:sin\:\left(90\right)\:i\right)4.2426\:\left(cos\:\left(45\right)\:+\:sin\:\left(45\right)\:i\right)

\rm =7\left(\cos \left(\dfrac{\pi }{2}\right)+\sin \left(\dfrac{\pi }{2}\right)i\right)\cdot \:4.2426\left(\cos \left(\dfrac{\pi }{4}\right)+\sin \left(\dfrac{\pi }{4}\right)i\right)

\rm 7\cdot \dfrac{21213}{5000}e^{i\dfrac{\pi }{2}}e^{i\dfrac{\pi }{4}}

\rm =\dfrac{148491\left(-1\right)^{\dfrac{3}{4}}}{5000}

=21-21i

After converting into the exponential form:

\rm =\dfrac{148491\left(-1\right)^{\dfrac{3}{4}}}{5000}

From part (b) and part (c) both results are the same.

Thus, the complex number  -7i into trigonometric form is 7 (cos (90) + sin (90) i) and  3 + 3i in trigonometric form is 4.2426 (cos (45) + sin (45) i)

Learn more about the complex number here:

brainly.com/question/10251853

#SPJ1

3 0
2 years ago
HELP ME PLEASE IM TIMED ILL MAKE U BRAINLIEST
Vadim26 [7]

Answer:

B

Step-by-step explanation:

The answer is B, -12.

Please give me brainliest.

-12^2 --> -144

-144+144 = 0

Therefore, the answer is B, -12.

3 0
3 years ago
Describe in words how the two quantities in each table are related.
Vilka [71]
Do you have a pic of what ur asking
7 0
3 years ago
To make sure that a given parallelogram is a rectangle, at least how many of
jeka94

Answer:

it can be either all or none

Step-by-step explanation:

because if you have one it will be off set just trust me.

7 0
3 years ago
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