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4 years ago

Simplify sec ( t ) cos ( t ) to a single trig function.

Mathematics

1 answer:

Anarel [89]4 years ago

8 0

sec ( t ) cos ( t ) = (1/cos (t)) *cos(t) = 1

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The data (1.5.8.5.1) represent a random sample of the number of days absent from school for five students at Monta Vista High. F

lianna [129]

Answer:

$\bar X = \frac{1+5+8+5+1}{5}= \frac{20}{5}= 4$

$\sigma= \sqrt{\frac{(1-4)^2 +(5-4)^2 +(8-4)^2 +(5-4)^2 +(1-4)^2}{5}} =\sqrt{\frac{36}{5}}= 2.68$

And based on this the best answer would be:

a. mean = 4; standard deviation = 2.68

Step-by-step explanation:

For this case we have the following data given:

1,5,8,5,1

We can find the sample mean with the following formula:

$\bar X = \frac{\sum_{i=1}^n X_i}{n}$

And replacing we got:

$\bar X = \frac{1+5+8+5+1}{5}= \frac{20}{5}= 4$

And for the deviation (assuming that the correct approximation is the deviation for a population) we can calculate the deviation with the following formula:

$\sigma = \sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n}}$

And replacing we got:

$\sigma= \sqrt{\frac{(1-4)^2 +(5-4)^2 +(8-4)^2 +(5-4)^2 +(1-4)^2}{5}} =\sqrt{\frac{36}{5}}= 2.68$

And based on this the best answer would be:

a. mean = 4; standard deviation = 2.68

3 0

4 years ago

Daikwon and Chris are about to record a new CD. They have a choice between two back up bands. One band charges $50 plus $20 for

MrRa [10]

Answer:

The second band

Step-by-step explanation:

50+20=70

20+25=45

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3 years ago

-2(x - 5) < 8 what is x

Amiraneli [1.4K]

Answer:

The answer is X > 1 hope that helps!

Step-by-step explanation:

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3 years ago

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monitta

Answer:

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Step-by-step explanation:

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4 years ago

Read 2 more answers

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Ivenika [448]

Answer:

a. 14:45pm (It's really easy to convert to a 24-hour clock time, all you need to do is add 12 hours onto the hour. Eg. 2 + 12 = 14 so it will be 14:45.pm

b. The length of time between 11:45am and 2:45pm is 3 hours.

I don't know what c is sorry.

Hope that helps. x

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2 years ago