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aleksklad [387]
3 years ago
11

Question 83 true or false and why ? plz ryt answer thanks

Mathematics
1 answer:
Vikki [24]3 years ago
6 0
The answer is false.

The formula for the SA of a cone is \pi r^{2}+\pi rl where <em>r</em> is the radius of the base and <em>l</em> is the slant height.
Since we have both the slant's height and the radius of the base we can answer this just by plugging numbers in;
SA=\pi r^{2}+\pi rl\\&#10;SA=\pi (2^{2})+\pi (2)(6)\\&#10;SA=4\pi+12\pi\\&#10;SA=16\pi\\
16\pi≈50.2654...

So your answer is false.
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aleksandr82 [10.1K]
6 gallons in 4 1/2 seconds to travel 1/4 mile
Multiply through by 4

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The dragster will :
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8 0
3 years ago
Find the length of BC.
Murrr4er [49]

Answer:

C, 53.68 units

Step-by-step explanation:

tan 54° = \frac{x}{39}

39 tan 54° = x

x= 53.6788949 (just plug it in a scientific or graphing calculator)

x≈53.68

4 0
2 years ago
Persons having Raynaud's syndrome are apt to suffer a sudden impairment of blood circulation in fingers and toes. In an experime
Citrus2011 [14]

Answer:

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Step-by-step explanation:

We have to perform a hypothesis test on the difference between means.

The null and alternative hypothesis are:

H_0: \mu_1-\mu_2=0\\\\H_a: \mu_1-\mu_2

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μ2: mean heat output for non-sufferers.

We will use a significance level of 0.05.

The difference between sample means is:

M_d=\bar x_1-\bar x_2=0.63-2.09=-1.46

The standard error is

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The t-statistic is

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The degrees of freedom are

df=n_1+n_2-2=9+9-2=16

The critical value for a left tailed test at a significance level of 0.05 and 16 degrees of freedom is t=-1.746.

The t-statistic is below the critical value, so it lies in the rejection region.

The null hypothesis is rejected.

There is enough evidence to say that the true average heat output of persons with the syndrmoe differs from the true average heat output of non-sufferers.

5 0
3 years ago
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so, the broadcast location and range is more or less like the picture below.

7 0
3 years ago
Read 2 more answers
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