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3 years ago

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Mark is a marketing representative for a publishing company. He is gathering data about a new book released. Which of the follow

ing is a statistical question that Mark can ask to get data on the book? A. How many pages are there in the book? B. What is the cost of the book? C. How many copies of the book have been sold at each store this month? D. When was the book published?

1 answer:

MArishka [77]3 years ago

4 0

Answer:

C.

Step-by-step explanation:

The answer is C. The other questions you have stated are questions that have one definite answer or, one that requires one variable in the situation. With many stores distributing the books, it's a matter of finding the percentage of how many of been sold at each store. From this it reveals, it's a statistical question.

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Prove that the curve a(t) = (cost, sin 2t, cos 2t) is regular on R and that it self-intersects at (1,0,1). Check the self-inters

alexandr402 [8]

Answer:

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Step-by-step explanation:

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3 years ago

A gallon of mik us about the same as 4 l of milk. about how many liter of milk are there in 10 gal

Anna [14]

The answer is 37.8541178
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3 years ago

Use Identities to find the exact value.<br> 24) cos(-75°)

harkovskaia [24]

Answer:

$\frac{1}{4}$ ( $\sqrt{6}$ - $\sqrt{2}$ )

Step-by-step explanation:

Using the addition formula for cosine

cos(x - y) = cosxcosy + sinxsiny

and the exact values

sin45° = cos45° = $\frac{1}{\sqrt{2} }$

cos60° = $\frac{1}{2}$ , sin60° = $\frac{\sqrt{3} }{2}$

Note that

cos(- 75)° = cos(45 - 120)°, thus

cos(45 - 120)°

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= cos45° ( - cos60°) + sin45° sin60°

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= - $\frac{1}{2\sqrt{2} }$ + $\frac{\sqrt{3} }{2\sqrt{2} }$

= $\frac{\sqrt{3}-1 }{2\sqrt{2} }$ × $\frac{\sqrt{2} }{\sqrt{2} }$

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3 years ago

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Tcecarenko [31]

Answer:

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Step-by-step explanation:

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Solve the system by the elimination method. Check your work. <br> x - 3y = 0<br> 3y - 6 = 2x

AlexFokin [52]

X-3y=0
<span>3y-6=2x
</span> next
x-3y=0
3y-2x=6
then you get
x-3y=0
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and next
x-3y=0
(-2+2*1)x+(3+2*-3)y=6
next
x-3y=0
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then
x-3y=0
y=-2
and
x+6=0
y=-2
and you get your final answer (-6,-2)

Answer: (-6,-2)
hope this helps I suck at explaining how to do things sorry, just look at the steps and that should help.

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3 years ago