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olga_2 [115]
2 years ago
12

What is the circumference of a DVD disc?

Mathematics
1 answer:
kap26 [50]2 years ago
6 0
The circumference of a DVD disc is 28.26 cm
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Line ab perpendicular to line MN how many right angles are formed where the two meet
iren [92.7K]
Just think about it
right angles are the very definition of perpendicular
how many right angles in a full rotation? 4

answer is 4
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3 years ago
Which ordered pairs are solutions to the inequality x+3y≥−8?
Dima020 [189]
I think the answer would be b
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3 years ago
Would the scale drawing of a rocket be smaller or larger than the original?
alina1380 [7]

Answer:

In real life, a scale copy is often smaller than the original figure.

Step-by-step explanation:

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3 years ago
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Write Y+2=1/3x in standard form
solong [7]

The standard form of a line is in the form

Ax + By = C

A, B and C are integers, and A is positive. Let's start with multiplying the whole equation by 3 to get rid of denominators:

3y+6=x

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x-3y=6

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4 0
3 years ago
Are you smarter than a second grader? A random sample of 60 second graders in a certain school district are given a standardized
denis23 [38]

Answer:

We accept H₀ , we do not have enought evidence for rejecting H₀

Step-by-step explanation:

Normal Distribution

sample size   n  =   60

standard deviation     σ  =  15

1.Hypothesis Test : Is a one tailed-test on the right

H₀      null hypothesis             μ₀  = 50

Hₐ    alternative hypothesis   μ₀  > 50

2.-We will do the test for  a significance level   α =  0,01 tht means for a 99% interval of confidence

then z(c)  =  2.32

3.- We compute z(s)  

z(s)  =  [ ( μ - μ₀ ) /( σ/√n )       ⇒  z(s)  =  (  2 * √60 ) / 15

z(s)  = 15.49/15                        ⇒   z(s)  = 1.033

4.- We compare values of  z(c)   and z(s)

z(s)  <  z(c)      1.033 < 2.32

z(s) is in the acceptance region so we accept H₀ , we do not have enough evidence for rejecting H₀

6 0
3 years ago
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