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3 years ago

Please answer this question ASAP! 25 points

Mathematics

1 answer:

Rina8888 [55]3 years ago

3 0

Answer:

(2p + r + 7) × (p + 9)

Step-by-step explanation:

Length: 2p + r + 7

Width: p + 9

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2 years ago

Suppose that contamination particle size (in micrometers) canbe modeled as

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Answer:

c) 2

d) 0.96

Step-by-step explanation:

We are given the following in the question:

$f(x) = 2x^{-3}, x > 1\\~~~~~~~= 0, x \leq 1$

a) probability density function.

$\displaystyle\int^{\infty}_{\infty}f(x) dx = 1\\\\\displaystyle\int^{\infty}_{-\infty}2x^{-3}dx = 1\\\\\displaystyle\int^{\infty}_{1}2x^{-3}dx\\\\\Rightarrow \big[-x^{-2}\big]^{\infty}_1\\\\\Rightarrow -(0-1) = 1$

Thus, it is a probability density function.

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$P(X$

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$\mu = \displaystyle\int^{\infty}_{-\infty}xf(x) dx\\\\\mu = \int^{\infty}_12x^{-2}dx\\\\\mu = (-\frac{2}{x})^{\infty}_{1}\\\\\mu = 2$

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2 years ago

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3 years ago

A cable company charges $35 for basic subscription and $4 per premium channel. Write a function rule that represents the money c

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Answer:

c = 4x + 35

Step-by-step explanation:

Imagine c = cost

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Let x = number of channels you buy. ($4/CHANNEL)

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c = 4x+35

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