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Damm [24]
4 years ago
9

The photo is the question

Mathematics
1 answer:
kakasveta [241]4 years ago
7 0
Multiply 20 by 37. This is 740.  Divide this by 2, this is 370.  She will donate $370 to charity
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Compare the fractions
fredd [130]
You have to find a common denominator first.
8 0
3 years ago
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Enter the degree form for 3π/4 radians in the box.
Paraphin [41]

Answer:

135 degrees

Step-by-step explanation:

2π radians is the central angle of a full circle, so 2π radians is 360 degrees.

That means that π radians = 180 degrees.

3π/4 radians * (180 degrees)/(π radians) = 135 degrees

3 0
3 years ago
The lengths of lumber a machine cuts are normally distributed with a mean of 100 inches and a standard deviation of 0.3 inch. ​(
ki77a [65]

Answer:

a) 0.345

b) 0.005

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 100

Standard Deviation, σ = 0.3

We are given that the distribution of lengths of lumber is a bell shaped distribution that is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

a) P(length greater than 100.12 ​inches)

P(x > 100.12)

P( x > 100.12) = P( z > \displaystyle\frac{100.12 - 100}{0.3}) = P(z > 0.4)

= 1 - P(z \leq 0.4)

Calculation the value from standard normal z table, we have,  

P(x > 100.12) = 1 - 0.655 = 0.345 = 34.5\%

b) Standard error due to sampling:

\displaystyle\frac{\sigma}{\sqrt{n}} = \frac{0.3}{\sqrt{41}} = 0.0468

P(length greater than 100.12 ​inches for the sample)

P(x > 100.12)

P( x > 100.12) = P( z > \displaystyle\frac{100.12 - 100}{0.0468}) = P(z > 2.564)

= 1 - P(z \leq 2.564)

Calculation the value from standard normal z table, we have,  

P(x > 100.12) = 1 - 0.995 = 0.005

8 0
4 years ago
Which formula gives the x-coordinates of the maximum values for y = cos(x)?
Vera_Pavlovna [14]
Cos(x) has a maximum at x=0
It is also a periodic function with a period of 2pi.So, the values of x for which cos(x) is maximum is x =0, 2Pi, 4π, 6π , .....
and -2π, -4π, -6π , .....

So, The formula gives the x-coordinates of the maximum values for y = cos(x)

k \pi \ for \ k \ =0 ,  \pm 2,  \pm4


6 0
4 years ago
Read 2 more answers
What is 3 to the 4th power
romanna [79]
81 because 3×3=9×3=27×3=81
3 0
3 years ago
Read 2 more answers
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