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MissTica
3 years ago
11

The price in dollars of a stereo system is given by p(q) = (1000/q2)+1000 where q represents the demand of the product.

Mathematics
1 answer:
elena-14-01-66 [18.8K]3 years ago
5 0

Answer:

  a) r(q) = 1000(q +1/q)

  b) r'(q) = 1000(1 -1/q^2)

  c) r'(10) = 990

Step-by-step explanation:

a) Revenue is the product of quantity and price:

  r(q) = q·p(q) = q(1000(1 +1/q^2))

  r(q) = 1000(q + 1/q)

__

b) The derivative is ...

  r'(q) = 1000(1 -1/q^2)

__

c) The derivative evaluated for q=10 is ...

  r'(10) = 1000(1 -1/10^2) = 1000(0.99)

  r'(10) = 990

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Therefore the sampling distribution has a mean of

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We want to find

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Part d)

We want to find :

P(73\:

We convert to z-scores and again use the standard normal distribution table.

P( \frac{73 - 74}{1} \:< \: z

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3 years ago
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