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2 years ago

Help please! I need the area of this given figure. The formula is A=1/2(b1+b2)h

Mathematics

2 answers:

Pie2 years ago

8 0

Answer:

108 ft

Correct me, if I am wrong :)

have a great day!

Thanks!

Airida [17]2 years ago

7 0

Answer:

324 square feet (or whatever you call it i don't use feet and inches lol)

Step-by-step explanation:

We gotta divide this into a trapezoid and a rectangle.

the rectangle part is easy which is 6x18=108

Then the trapezoid

b1=6 b2=18 h=18

6+18=24

24x18=432

432/2=216

now we add them 216+108=324

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OLga [1]

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3 years ago

The mean number of hours of flying time for pilots at Continental Airlines is 49 hours per month. Assume that this mean was base

Effectus [21]

Answer:

a) 17.09 hours

b) The 95% confidence interval estimate of the population mean flying time for the Pilots is between 31.91 hours and 66.09 hours

Step-by-step explanation:

We have the standard deviation of 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 = 49 - 1 = 48

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 48 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.95}{2} = 0.975$ . So we have T = 2.0106

The margin of error is:

M = T*s = 2.0106*8.5 = 17.09

s is the standard deviation of the sample. 17.09 hours is the answer for a.

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The upper end of the interval is the sample mean added to M. So it is 49 + 17.09 = 66.09 hours

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8 0

3 years ago

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3 years ago

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san4es73 [151]

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5 0

3 years ago