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3 years ago

there are 12 students working in the library. If 3/4 of them are girls, how many girls are working in the library?

Mathematics

2 answers:

Inga [223]3 years ago

6 0

There are 9 girls working in the library.

kolezko [41]3 years ago

6 0

$\text {Total number of students = 12}$

$\text {Number of girls = } \dfrac{3}{4} \text { of the students}$

$\text {Number of girls = } \dfrac{3}{4} \times 12$

$\text {Number of girls = } \dfrac{3}{4} \times \dfrac{12}{1}$

$\text {Number of girls = } 9$

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Answer: There are 9 girls in the library.
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Question 2 - Signal and System Properties. State whether each of the statements is true or false. Note that a statement is true

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(a) true

(b) true

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Step-by-step explanation:

(a) "s(t) is periodic with period T" means s(t) = s(t+nT) for any integer n. Since values of n may be of the form n = 2m for any integer m, then this also means ...

s(t) = s(t +2mt) = s(t +m(2T)) . . . for any integer m

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4 years ago

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Tpy6a [65]

The <em>correct answer</em> is:

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If the outlier is very small, the median will slightly decrease compared to the data set without the outlier.

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3 years ago

Find the exact value of cot 330° in simplest form with a rational denominator.

Hoochie [10]

Answer:

$\cot 330^{\circ} = -\sqrt{3}$

Step-by-step explanation:

The cotangent function can be rewritten by trigonometric relations, that is:

$\cot 330^{\circ} = \frac{1}{\tan 330^{\circ}} = \frac{\cos 330^{\circ}}{\sin 330^{\circ}}$ (1)

By taking approach the periodicity properties of the cosine and sine function (both functions have a period of 360°), we use the following equivalencies:

$\sin 330^{\circ} = \sin (-30^{\circ}) = -\sin 30^{\circ}$ (2)