MATHEMATICS COLLEGE

(6*3 Square root ÷9=​

Answers

Answer 1
Answer: So 6*3 is 18
The square root of 9 is 3
18/3 is 6
Answer is 6
Hope I helped:)

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El producto de un número y 56

C=amt what does m equal to?

Answers

m = c/a/t because you need to divide everything else over.
C = amt
C/at = amt/at
C/at = m

m = C/at.

The equation is solved for m as follows.

The following figures are similar, find the value of x

Answers

Answer:

x=143

Step-by-step explanation:

scale factor (if that is the correct term) is 13. you find that by matching sides to side. this means that 91/7=13, therefore you know that 4*13 is 52 and 11*13 is 143
The answer is x =143 I’m pretty sure

Questions number 1 How much paper is used for the label of the container, which covers the lateral surface area of the cylinder? Round your answer to the nearest tenth.
question number 2
what volume of oats will fill the container? Round your answer to the nearest tenth. ​

Answers

9514 1404 393

Answer:

  145.3 square inches

Step-by-step explanation:

The lateral area of the cylinder is given by ...

  LA = 2πrh

  LA = 2π(2.5 in)(9.25 in) = 46.25π in²

  LA ≈ 145.3 in²

About 145.3 square inches of paper is used for the label.

Nielsen Media Research wants to estimate the mean amount of time, in minutes, that full-time college students spend texting each weekday.Find the sample size necessary to estimate that mean with a 15 minute margin of error. Assume that a 96% confidence level is desired and that the standard deviation is estimated to be 112.2 minutes.

Answers

Answer:

n=237

Step-by-step explanation:

Previous concepts

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

Assuming the X follows a normal distribution

X \sim N(\mu, \sigma=112.2)

We know that the margin of error for a confidence interval is given by:

Me=z_(\alpha/2)(\sigma)/(√(n))   (1)

The next step would be find the value of \z_(\alpha/2), \alpha=1-0.96=0.04 and \alpha/2=0.02

Using the normal standard table, excel or a calculator we see that:

z_(\alpha/2)=2.054

If we solve for n from formula (1) we got:

√(n)=(z_(\alpha/2) \sigma)/(Me)

n=((z_(\alpha/2) \sigma)/(Me))^2

And we have everything to replace into the formula:

n=((2.054(112.2))/(15))^2 =236.05

And if we round up the answer we see that the value of n to ensure the margin of error required \pm=15 min is n=237.

Weights of men: 90% confidence; n = 14, x=161.5 lb, s =13.7 lb

Answers

Answer:

The 90% for the average weights of men is between 137.24 lb and 185.76 lb.

Step-by-step explanation:

We have the standard deviation for the sample, so we use the t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 14 - 1 = 14

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 14 degrees of freedom(y-axis) and a confidence level of 1 - (1 - 0.9)/(2) = 0.95. So we have T = 1.7709

The margin of error is:

M = T*s = 1.7709*13.7 = 24.26

In which s is the standard deviation of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 161.5 - 24.26 = 137.24 lb

The upper end of the interval is the sample mean added to M. So it is 161.5 + 24.26 = 185.76 lb

The 90% for the average weights of men is between 137.24 lb and 185.76 lb.

Determine the volume of this object 1) 113 mm
2) 226.1 mm
3) 339.1 mm
4) 450 mm

Answers

Answer:

I think it would be 450 mm.
I believe 2 (226.1 mm) is the correct answer.
Step 1.

Find the circumference of the circle.
6(2)•3.14
37.68

Step 2. Multiply the circumference with the height (12mm)
37.68•12=452.16.

Final step: Divide your final answer by 2 because this object shown above is a cone.
452.16/2=226.08
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