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kipiarov [429]
3 years ago
11

To win a​ lottery, 7 numbers are drawn at random from a pool of 63 numbers. Numbers cannot repeat. If a person has one​ ticket,

what is the probability that they have the winning​ ticket?
Mathematics
1 answer:
Elena-2011 [213]3 years ago
7 0

Answer:

9%

Step-by-step explanation:

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Find the product of z1 and z2, where z1 = 7(cos 40° + i sin 40°) and z2 = 6(cos 145° + i sin 145°).
Oduvanchick [21]
For two complex numbers z_1=re^{i\theta}=r(\cos\theta+i\sin\theta) and z_2=se^{i\varphi}=s(\cos\varphi+i\sin\varphi), the product is

z_1z_2=rse^{i(\theta+\varphi)}=rs(\cos(\theta+\varphi)+i\sin(\theta+\varphi))

That is, you multiply the moduli and add the arguments. You have z_1=7e^{i40^\circ} and z_2=6e^{i145^\circ}, so the product is

z_1z_2=7\times6(\cos(40^\circ+145^\circ)+i\sin(40^\circ+145^\circ)=42(\cos185^\circ+i\sin185^\circ)=42e^{i185^\circ}
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3 years ago
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How many different 2 digit numbers can you make with 4,6, and 8 if the numbers can not be repeated
Morgarella [4.7K]

Answer:

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Step-by-step explanation:

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A box is to be constructed with a rectangular base and a height of h cm. The length, l, of the box is 10 cm, and the width, w, i
Svetradugi [14.3K]
<span>The formula for the volume of a box is: Volume = L*W*H We know that the length is 10 cm. We know that the width is twice the height, so W = 2H. Then our volume equation is: Volume = 10*2H*H Volume = 20*H^2 Since H^2 is in the equation, this is a quadratic equation.</span>
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Step-by-step explanation:

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