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svetoff [14.1K]
3 years ago
5

Kristin bought a pack of 12 pencils for $1.25. How much was each pencil?????????????

Mathematics
1 answer:
gregori [183]3 years ago
5 0

Answer:

$0.10/pencil

Step-by-step explanation:

Find the unit cost.  To do this, divide $1.25 by 12 pencils, obtaining:

 $1.25

---------------- = $0.1042/pencil, or (more logically) $0.10/pencil

12 pencils

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Which of the following is NOT true of the confidence level of a confidence​ interval? Choose the correct answer below. A. The co
Grace [21]

Answer:

<em>There is a 1-a ​chance, where a is the complement of the confidence​ level, that the true value of p will fall in the confidence interval produced from our sample.</em>  ( B )

Step-by-step explanation:

Confidence level depicts the probability that the confidence interval actually contains the values of p ( true values of P ) hence

<em>There is a 1-a ​chance, where a is the complement of the confidence​ level, that the true value of p will fall in the confidence interval produced from our sample</em> Is a complete misinterpretation of the confidence interval therefore it is NOT true

8 0
2 years ago
Eight ones six tens what is the answer
Zielflug [23.3K]
Eight ones = 8
Six tens= 60
60 + 8 = 68
6 0
3 years ago
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Triangle RST is rotated 90° in a clockwise direction. What is the name of the image after the rotation?
Art [367]
When the triangle RST is rotated by <span>90° in a clockwise direction, the name of the image after the rotation would be SRT.

The reason you get a name like this is because you're not only rotating the triangle, you also rotating the letters along with the image.
</span>
7 0
3 years ago
The derivative of y with respect to x, when y = 3e^5x - 2 is:
Ede4ka [16]
Answer: 15e^5x

Step - by - step

y=3e^5x - 2

By the sum rule, the derivative of 3e^5x - 2 with respect to x is d/dx [ 3e^5x ] + d/dx [-2].

d/dx [ 3e^5x ] + d/dx [ -2 ]

Evalute d/dx [ 3e^5x ]

Since 3 is constant with respect to x , the derivative of 3e^5x with respect to x is
3 d/dx [ e^5x ].

3 d/dx [ e^5x ] + d/dx [ -2 ]

Differentiate using the chain rule, which states that d/dx [ f(g(x))] is f' (g(x)) g' (x) where f(x) = e^x and g(x) = 5x.

To apply the Chain Rule, set u as 5x.
3 ( d/du [ e^u] d/dx [5x] ) + d/dx [ -2]

Differentiate using the Exponential rule which states that d/du [ a^u ] is a^u ln(a) where a=e.

3( e^u d/dx[5x] ) + d/dx [ -2 ]
Replace
3(e^5x d/dx [5x] ) + d/dx [ -2 ]
3(e^5x( 5 d/dx [x] )) + d/dx [ -2 ]

Diffentiate using the Power Rule which states that d/dx [x^n] is nx^n-1 where n=1.
3(e^5x(5*1)) + d/dx [-2]
3 ( e^5x * 5 ) + d/dx [-2]

Multiply 5 by 3
15e^5x + d/dx [-2]

Since -2 is constant with respect to x, the derivative of -2 with respect to x is 0.
15e^5x + 0
15e^5x
5 0
1 year ago
Hey you can help me out with this
iogann1982 [59]

Answer:

Step-by-step explanation:

To find the angles of any shape with all sides equal in length, we use the formula:

    \frac{(n-2)*180}{n} , where n is the number of sides

For a pentagon, we get the equation:

\frac{(5-2)*180}{5}= 108 degrees

Thus the measure of each in a pentagon if the lengths of all five sides are equal is 108 degrees.

Hope that helps!

6 0
3 years ago
Read 2 more answers
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