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3 years ago

What’s the length of BD ?

Mathematics

2 answers:

Sergeeva-Olga [200]3 years ago

5 0

The answer is 4.99.

Since tan = oposite/adjacent we can plug in the values we know.

Rina8888 [55]3 years ago

3 0

Answer:

BD = 4.99

Step-by-step explanation:

You can simply use the trigonometric identity tangent to solve for length BD.

Tan = opposite/adjacent

In this case we have,

Tan 31 = 3/BD

BD = 3/Tan 31

BD = 4.99

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4 years ago

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3 years ago

Read 2 more answers

Describe a way to make the arithmetic problem 45% x 680 mentally

lord [1]

Answer:

306.

Step-by-step explanation:

Firstly, we are aware 100% of 680 is obviously 680,

Next, we know half of a 100% is 50% therefore half of 680 is 340.

Then, we know 45% is 5% less than 50%

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<em>Hope this helps.</em>

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3 years ago

Using the simple random sample of weights of women from a data set, we obtain these sample statistics: nequals45 and x overbar

Tomtit [17]

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Step-by-step explanation:

Given sample statistics : $n=45$

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$\sigma=31.37\text{ lb}$

a) We know that the best point estimate of the population mean is the sample mean.

Therefore, the best point estimate of the mean weight of all women = $\mu=148.79\text{ lb}$

b) The confidence interval for the population mean is given by :-

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$z_{\alpha/2}\times\dfrac{\sigma}{\sqrt{n}}$

Given : Significance level : $\alpha=1-0.90=0.1$

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Hence, the 90% confidence interval estimate of the mean weight of all women= (141.1, 156.48)

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3 years ago

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