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WITCHER
15 days ago
7

1+4=5, 2+5=12, 3+6=21,8+11=

Mathematics
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Given that P = (-5, 5) and Q = (-13, 10), find the component form and magnitude of 2 vector PQ.
tester [12383]
Define the unit vectors along the x and y axes as \hat{i}, \, \hat{j} correspondingly.

Consequently, the vector from P to Q is
\vec{PQ} = (-13+5)\hat{i} + (10-5)\hat{j} = -8\hat{i} + 5\hat{j}
In terms of components, vector PQ is represented as (-8,5).

The magnitude of vector PQ can be calculated as
√[(-8)² + 5²] = √(89) = 9.434

Answer:
Thus, vector PQ is (-8, 5), and its magnitude equals √89 (or 9.434).
4 0
2 months ago
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The random variable KK has a geometric distribution with mean 16. Which of the following is closest to the standard deviation of
Inessa [12570]

Answer:

E 240

Step-by-step explanation:

Mean of the geometric distribution = (1- p) / p

16 = (1 - p) / p

16p = 1 - p;  17p = 1; thus, p = 1/17 = 0.058  

Standard Deviation = (1 - p) / p^2

= (1 - 0.058) / (0.058)^2

0.942 / 0.003364

= 280, which is closest to 240

5 0
2 months ago
Fifty people enter a contest in which three identical prizes will be awarded. in how many different ways can the prizes be award
zzz [12365]
<span>Given that each individual can receive a single prize, there are 50*49*48= 117600 different ways to allocate the prizes. The first award can be given to any of the 50 participants, the second to one of the remaining 49, and the last to one of the leftover 48. Multiplying these options together provides the solution.</span>
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2 months ago
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