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3 years ago

A weather forecaster says the temperature will be about -5 Celsius “give or take” 10 degrees.

2 answers:

5 0

The weather forecaster means -5 +/- 10
The greatest possible temperature is 5 Celsius
The least possible temperature is -15 Celsius

svet-max [94.6K]3 years ago

4 0

Answer:

Greatest temperature would be 5 degrees celsius

Least possible temperature would be -15 degrees celsius

Step-by-step explanation:

When we say "give" it means adding the value

So giving 10 degrees would mean adding 10 to -5 degrees

-5+10 = 5 degrees celsius

When we say "take" it means subtracting the value

So take 10 degrees would mean subtracting 10 from -5 degrees

-5-10 = -15 degrees celsius

Greatest temperature would be 5 degrees celsius

Least possible temperature would be -15 degrees celsius

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BaLLatris [955]

Answer:

133.97 cm³

Step-by-step explanation:

The volume of a cone is given by:

$V = \frac13 \pi r^2h$

r is half the diameter, so 4 cm

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So:

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3 years ago

Read 2 more answers

The answer to (-15) + 33

Elan Coil [88]

Answer:

Step-by-step explanation:

33-15=18

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3 years ago

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The producer of a certain bottling equipment claims that the variance of all its filled bottles is .027 or less. A sample of 30

o-na [289]

Answer:

$p_v = P(\chi^2_{29}>42.963)=1-0.954=0.0459$

b. between .025 and .05

Step-by-step explanation:

Previous concepts and notation

The chi-square test is used to check if the standard deviation of a population is equal to a specified value. We can conduct the test "two-sided test or a one-sided test".

$\bar X$ represent the sample mean

n = 30 sample size

s= 0.2 represent the sample deviation

$\sigma_o =\sqrt{0.027}=0.164$ the value that we want to test

$p_v$ represent the p value for the test

t represent the statistic

$\alpha=$ significance level

State the null and alternative hypothesis

On this case we want to check if the population standard deviation is less than 0.027, so the system of hypothesis are:

H0: $\sigma \leq 0.027$

H1: $\sigma >0.027$

In order to check the hypothesis we need to calculate the statistic given by the following formula:

$t=(n-1) [\frac{s}{\sigma_o}]^2$

This statistic have a Chi Square distribution distribution with n-1 degrees of freedom.

What is the value of your test statistic?

Now we have everything to replace into the formula for the statistic and we got:

$t=(30-1) [\frac{0.2}{0.164}]^2 =42.963$

What is the approximate p-value of the test?

The degrees of freedom are given by:

$df=n-1= 30-1=29$

For this case since we have a right tailed test the p value is given by:

$p_v = P(\chi^2_{29}>42.963)=1-0.954=0.0459$

And the best option would be:

b. between .025 and .05

6 0

3 years ago

A ferris wheel is 10 meters in diameter and boarded from a platform that is 5 meters above the ground. The six o'clock position

Murrr4er [49]

Answer:

The equation is:

f (t) = 4 + 5 (1 - cos (2pi t / 2))

Step-by-step explanation:

with the previous exercise we look for the equation for h = f (t)

So the data we have are

Wheel diameter = 10m (wheel radius = 5m)

1 wheel gets 1 revolution in 2 minutes.

the beginning of a entry will be related to that f (0) = 4

our wish is that f (z) get at least 4 with an amplitude of 5 (this value determines the radius of the wheel) for 2 minutes

with this the particle f (t) is transformed into

f (t) = 4 + 5 (1 - cos (2pi t / 2))

We know that the maximum value of cos in t will be 0, 1 -cos has minutes, the result will be as follows:

f (t) = 4 + 5 (1 - cos (2pi t / 2))

5 0

2 years ago

Write a expression that represents 72 divided by n plus 4

jeka57 [31]

Answer:

72 divided by n + 4

Step-by-step explanation:

its actually directly in the picture

5 0

3 years ago