Juanita did this work to solve an equation. Did she make an error?

Mathematics

2 answers:

Sergio [31]2 years ago

6 0

Yes it should be a negative nine not a positive nine

Have a nice day : )

sashaice [31]2 years ago

6 0

Answer:

Step-by-step explanation:

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The RideEm Bicycles factory can produce 110 bicycles in a day at a total cost of $10,900 and it can produce 130 bicycles in a da

kolbaska11 [484]

C - fixed costs; b - costs per bicycle;
c + 110 b = 10,900
c + 130 b = 11,600
c = 10,900 - 110 b
10,900 - 110 b + 130 b = 11,600
20 b = 700
b = 700 : 20 = $35
c + 110 * 35 = 10,900
c + 3,850 = 10,900
c = 10,900 - 3,850
c = $7,050 ( daily fixed costs )
Marginal cost is the cost of producing one more unit of goods ( one more bicycle ).
Answer:
The company`s daily fixed cost is $7,050.
The marginal cost per bicycle is $35.

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2 years ago

a recipe for a batch of 3 dozen chocolate chip cookies calls for 3 cups of flour, 1 cup of sugar, and 2 cups of chocolate chips.

Contact [7]

Just divide the entire recipe by 3. Then multiply by 2. 2 cups flower, 2/3 cups sugar, 1 and 1/3 cup chocolate chips.

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3 years ago

Picture shown help! !!

ankoles [38]

C is the answer to this question

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2 years ago

1Y, the number of accidents per year at a given intersection, is assumed to have a Poisson distribution. Over the past few years

miss Akunina [59]

Answer:

The probability that the intersection will come under the emergency program is 0.1587.

Step-by-step explanation:

Lets divide the problem in months rather than in years, because it is more suitable to divide the period to make a better approximation. If there were 36 accidents in average per year, then there should be 3 accidents per month in average. We can give for the amount of accidents each month a Possion distribution with mean 3 and variance 3.

Since we want to observe what happen in a period of one year, we will use a sample of 12 months and we will take its mean. We need, in average, more than 45/12 = 3.75 accidents per month to confirm that the intersection will come under the emergency program.

For the central Limit theorem, the sample mean will have a distribution Normal with mean 3 and variance 3/12 = 0.25; thus its standard deviation is √0.25 = 1/2.

Lets call the sample mean distribution X. We can standarize X obtaining a standard Normal random variable W with distribution N(0,1).

$W = \frac{X-\mu}{\sigma} = \frac{X-3}{1/2} = 2x-6$

The values of $\phi$ , the cummulative distribution function of W, can be found in the attached file. We are now ready to compute the probability of X being greater than 3.75, or equivalently, the probability than in a given year the amount of accidents is greater than 45, leading the intersection into an emergency program