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lys-0071 [83]
3 years ago
11

Consider a sample of blades for a circular saw. Their diameters are measured and found to have a variance of 2.42. Give a point

estimate for the population variance in diameters of blades for a circular saw. Round your answer to two decimal places, if necessary.
Mathematics
1 answer:
zubka84 [21]3 years ago
6 0

Answer:

2.42

Step-by-step explanation:

We are asked to consider a sample of blades for a circular saw, and their diameters were measured.

We are told they have a sample of variance, S²= 2.42

We are told to give a point estimate for the population variance in diameters of blades for the circular saw.

The sample variance, S² can be said to be a point estimate of the population variance.

Therefore, it can be said that the sample variance, S² is a point estimate for the population variance, b².

Which can also be written as:

b² = S²

b² = S² = 2.42

• The point estimate for the population variance is 2.42

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Answer:

a. A = C_{0}(1-x)^t\\x: percentage\ of \ caffeine\ metabolized\\

b. \frac{dA}{dt}= -11.25 \frac{mg}{h}

Step-by-step explanation:

First, we need tot find a general expression for the amount of caffeine remaining in the body after certain time. As the problem states that every hour x percent of caffeine leaves the body, we must substract that percentage from the initial quantity of caffeine, by each hour passing. That expression would be:

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Then, to find the amount of caffeine metabolized per hour, we need to differentiate the previous equation. Following the differentiation rules we get:

\frac{dA}{dt} =C_{0}(1-x)^t \ln (1-x)\\\frac{dA}{dt} =100*0.88\ln(0.88)\\\frac{dA}{dt} =-11.25 \frac{mg}{h}

The rate is negative as it represents the amount of caffeine leaving the body at certain time.

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3 years ago
Blake has a glass tank. First, he wants to put some marbles in it, all of the same volume. Then, he wants to fill the tank with
NeTakaya

Answer:

32 liters is the volume of the glass tank

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2 years ago
In order to reduce their debt, the Johnsons sold some real estate property valued at $165,000 for $143,000. They paid off a loan
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The correct answer is option "b", "<span>The Johnsons increased their liquid assets".

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alexandr402 [8]

Answer:

The answer to your question is C. 3.2

Step-by-step explanation:

 | 3.2 |

lines |  |  mean absolute value, and absolute value means the distance of a number to the origin (0,0) it does not matter the sign.

Then to answer your question just do not write the |  |  and consider it as a positive sign.

If your question had a negative number  ex. | -3.2 | the answer would also be 3.2.

Step-by-step explanation:

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